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Ksenzhik, G., and E. Karin. "Cartographic materials on the history of Kazakhstan of the XVII–early XX centuries: consolidated catalog." Bulletin of the Karaganda university History.Philosophy series 105, no. 1 (March 30, 2022): 100–110. http://dx.doi.org/10.31489/2022hph1/100-110.
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The article is devoted to the analysis, cataloging of cartographic material of the consolidated catalog of “old” maps on the history of Kazakhstan in the XVII–early XX centuries. The funds for storage of cartographic materials in archives and libraries of Moscow and Orenburg are characterized. The functional values of the developed consolidated catalog of “old” maps have been substantiated. The consolidated catalog of cartographic materials can be considered as a kind of “guide” for potential users, with the help of which the user can get answers to the following questions: What archives, libraries, museums have the necessary cartographic material for the user and view cartographic bibliographies of “old” maps on the history of Kazakhstan. Based on the intermediate result of the research, a consolidated catalog of cartographic materials was prepared, comprising 282 cartographic sources of the XVII–early XX centuries on the history of Kazakhstan, which are of high scientific and social significance. Most of the cartographic materials on the early period of the history of Kazakhstan at the beginning of the XVII century are mainly of foreign origin. To fill with additional possibilities, the consolidated catalog of “old” maps for potential readers is enriched with photo files of cartographic materials accompanying the cartobibliographic record of “old” maps from the consolidated catalog. The identified cartographic materials are subjected to source analysis, assessment, and description. It has been established that cartographic materials on the history of Kazakhstan in the XVII–early XX centuries should not be studied in isolation but as part of the cartography of a certain era in all its interconnections and interdepend encies with the development of related areas of knowledge (history, geography, geodesy, etc.)
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Urban, S. E., and G. L. Wycoff. "Densifying the Optical Reference Frame: The Tycho-2 Catalog of 2.5 Million Stars." International Astronomical Union Colloquium 180 (March 2000): 75–79. http://dx.doi.org/10.1017/s0252921100000130.
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AbstractSince the establishment of the Hipparcos Catalog as the defining source of the optical reference frame, densification beyond its ≈ 120,000 stars has been made possible by the utilization of the Tycho-1 Catalog. The ACT, combining the old Astrographic Catalog (AC) data with the Tycho-1 positions, is the best known example of this. The Tycho-2 consortium, led by E. Høg, has performed new reductions on the Tycho data. This not only has increased the astrometric and photometric accuracies of the original 1 million Tycho-1 stars, but also has added an additional 1.5 million stars. The U.S. Naval Observatory led the effort to compute the proper motions of these 2.5 million stars. They are based not only on the AC data but also include over 140 other ground-based catalogs, all directly reduced to the Hipparcos system. The result of these efforts is the Tycho-2 Catalog, available since February 2000. Positions, proper motions, and BT and VT magnitudes are given for 2.5 million stars. The catalog is 99% complete to V=11.0, and 90% complete to V=11.5. Positional accuracies at the mean epochs vary from < 10 mas for stars V < 9 to just under 100 mas for V > 12. Proper motion accuracies are estimated to be 1.3 mas/year to 3.0 mas/year for the same magnitude ranges. Photometric accuracies range from 0.02 magnitudes for the brightest stars to 0.25 magnitudes for the faintest.
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Chujo, Michio, and Michitaka Chujo. "A CATALOG OF THE EROTYLIDAE (INSECTA, COLEOPTERA) FROM THE OLD WORLD (EXCL. THE ETHIOPIAN REGION)." ESAKIA 26 (January 25, 1988): 139–85. http://dx.doi.org/10.5109/2510.
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Chujo, Michio, and Michitaka Chujo. "A CATALOG OF THE EROTYLIDAE (INSECTA, COLEOPTERA) FROM THE OLD WORLD (EXCL. THE ETHIOPIAN REGION)." ESAKIA 28 (March 3, 1989): 75–96. http://dx.doi.org/10.5109/2516.
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Massaro, F., S. V. White, A. García-Pérez, A. Jimenez-Gallardo, A. Capetti, C. C. Cheung, W. R. Forman, et al. "Powerful Radio Sources in the Southern Sky. I. Optical Identifications." Astrophysical Journal Supplement Series 265, no. 2 (March 15, 2023): 32. http://dx.doi.org/10.3847/1538-4365/acaf05.
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Abstract Since the early sixties, our view of radio galaxies and quasars has been drastically shaped by discoveries made thanks to observations of radio sources listed in the Third Cambridge Catalog and its revised version (3CR). However, the largest fraction of data collected to date on 3CR sources was performed with relatively old instruments, rarely repeated and/or updated. Importantly, the 3CR contains only objects located in the Northern Hemisphere, thus having limited access to new and innovative astronomical facilities. To mitigate these limitations, we present a new catalog of powerful radio sources visible from the Southern Hemisphere, extracted from the GLEAM 4 Jy (G4Jy) catalog and based on equivalent selection criteria as the 3CR. This new catalog, named G4Jy-3CRE, where the E stands for “equivalent,” lists a total of 264 sources at decl. below −5° and with 9 Jy limiting sensitivity at ∼178 MHz. We explored archival radio maps obtained with different surveys and compared them with optical images available in the Pan-STARRS, DES, and DSS databases to search for optical counterparts of their radio cores. We compared mid-infrared counterparts, originally associated in the G4Jy, with the optical ones identified here, and we present results of a vast literature search carried out to collect redshift estimates for all G4Jy-3CRE sources resulting in a total of 145 reliable z measurements.
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Chujo, Michio, and Michitaka Chujo. "A CATALOG OF THE EROTYLIDAE (INSECTA, COLEOPTERA) FROM THE OLD WORLD (EXCL. THE ETHIOPIAN REGION) III." ESAKIA 29 (September 30, 1990): 1–67. http://dx.doi.org/10.5109/2546.
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Ivezić, Ž., D. G. Monet, N. Bond, M. Jurić, B. Sesar, J. A. Munn, R. H. Lupton, et al. "Astrometry with digital sky surveys: from SDSS to LSST." Proceedings of the International Astronomical Union 3, S248 (October 2007): 537–43. http://dx.doi.org/10.1017/s1743921308020103.
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AbstractMajor advances in our understanding of the Universe have historically come from dramatic improvements in our ability to accurately measure astronomical quantities. The astrometric observations obtained by modern digital sky surveys are enabling unprecedentedly massive and robust studies of the kinematics of the Milky Way. For example, the astrometric data from the Sloan Digital Sky Survey (SDSS), together with half a century old astrometry from the Palomar Observatory Sky Survey (POSS), have enabled the construction of a catalog that includes absolute proper motions as accurate as 3 mas/year for about 20 million stars brighter than V=20, and for 80,000 spectroscopically confirmed quasars which provide exquisite error assessment. We discuss here several ongoing studies of Milky Way kinematics based on this catalog. The upcoming next-generation surveys will maintain this revolutionary progress. For example, we show using realistic simulations that the Large Synoptic Survey Telescope (LSST) will measure proper motions accurate to 1 mas/year to a limit 4 magnitude fainter than possible with SDSS and POSS catalogs, or with the Gaia survey. LSST will also obtain geometric parallaxes with accuracy similar to Gaia's at its faint end (0.3 mas at V=20), and extend them to V=24 with an accuracy of 3 mas. We discuss the impact that these LSST measurements will have on studies of the Milky Way kinematics, and potential synergies with the Gaia survey.
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Yuan, Ye, Fan Li, Yanning Fu, and Shulin Ren. "New precise positions in 2013–2019 and a catalog of ground-based astrometric observations of 11 Neptunian satellites (1847–2019) based on Gaia-DR2." Astronomy & Astrophysics 645 (January 2021): A48. http://dx.doi.org/10.1051/0004-6361/202038776.
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Context. Developing high-precision ephemerides for Neptunian satellites requires not only the continuation of observing campaigns but also the collection and improvement of existing observations. So far, no complete catalogs of observations of Neptunian satellites are available. Aims. We aim to provide new, precise positions, and to compile a catalog including all available ground-based astrometric observations of Neptunian satellites. The observations are tabulated in a single and consistent format and given in the same timescale, the Terrestrial Time (TT), and reference system, the International Celestial Reference System (ICRS), including necessary changes and corrections. Methods. New CCD observations of Triton and Nereid were made at Lijiang 2.4-m and Yaoan 0.8-m telescopes in 2013–2019, and then reduced based on Gaia-DR2. Furthermore, a catalog called OCNS2019 (Observational Catalog of Neptunian Satellites (2019 version)) was compiled, after recognizing and correcting errors and omissions. Furthermore, in addition to what was considered for the COSS08 catalog for eight main Saturnian satellites, all observed absolute and relative coordinates were converted to the ICRS with corrections for star catalog biases with respect to Gaia-DR2. New debiasing tables for both the modern and old star catalogs, which were previously not provided based on Gaia-DR2, are developed and applied. Treatment of missing positions of comparison bodies in conversions of observed relative coordinates are proposed. Results. OCNS2019 and the new debiasing tables are publicly available online. OCNS2019 includes 24996 observed coordinates of 11 Neptunian satellites obtained over 3741 nights from 1847 to 2019. All observations are given in TT and ICRS. The star catalog biases are removed, which are significant for Nereid and outer satellites. We obtained 880 (5% of total now available) new coordinates for Triton over 41 nights (1% of total observation nights so far), and 790 (14%) for Nereid over 47 nights (10%). The dispersions of these new positions are about 0.″03 for Triton and 0.″06 for Nereid. Conclusions. OCNS2019 should be useful in improving ephemerides for the above-mentioned objects.
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Yuan, Ye, Fan Li, Yanning Fu, and Shulin Ren. "New precise positions in 2013–2019 and a catalog of ground-based astrometric observations of 11 Neptunian satellites (1847–2019) based on Gaia-DR2." Astronomy & Astrophysics 645 (January 2021): A48. http://dx.doi.org/10.1051/0004-6361/202038776.
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Context. Developing high-precision ephemerides for Neptunian satellites requires not only the continuation of observing campaigns but also the collection and improvement of existing observations. So far, no complete catalogs of observations of Neptunian satellites are available. Aims. We aim to provide new, precise positions, and to compile a catalog including all available ground-based astrometric observations of Neptunian satellites. The observations are tabulated in a single and consistent format and given in the same timescale, the Terrestrial Time (TT), and reference system, the International Celestial Reference System (ICRS), including necessary changes and corrections. Methods. New CCD observations of Triton and Nereid were made at Lijiang 2.4-m and Yaoan 0.8-m telescopes in 2013–2019, and then reduced based on Gaia-DR2. Furthermore, a catalog called OCNS2019 (Observational Catalog of Neptunian Satellites (2019 version)) was compiled, after recognizing and correcting errors and omissions. Furthermore, in addition to what was considered for the COSS08 catalog for eight main Saturnian satellites, all observed absolute and relative coordinates were converted to the ICRS with corrections for star catalog biases with respect to Gaia-DR2. New debiasing tables for both the modern and old star catalogs, which were previously not provided based on Gaia-DR2, are developed and applied. Treatment of missing positions of comparison bodies in conversions of observed relative coordinates are proposed. Results. OCNS2019 and the new debiasing tables are publicly available online. OCNS2019 includes 24996 observed coordinates of 11 Neptunian satellites obtained over 3741 nights from 1847 to 2019. All observations are given in TT and ICRS. The star catalog biases are removed, which are significant for Nereid and outer satellites. We obtained 880 (5% of total now available) new coordinates for Triton over 41 nights (1% of total observation nights so far), and 790 (14%) for Nereid over 47 nights (10%). The dispersions of these new positions are about 0.″03 for Triton and 0.″06 for Nereid. Conclusions. OCNS2019 should be useful in improving ephemerides for the above-mentioned objects.
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Girelli, Giacomo, Micol Bolzonella, and Andrea Cimatti. "Massive and old quiescent galaxies at high redshift." Astronomy & Astrophysics 632 (December 2019): A80. http://dx.doi.org/10.1051/0004-6361/201834547.
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Aims. Questions of how massive quiescent galaxies rapidly assembled and how abundant they are at high redshift are increasingly important in the study of galaxy formation. Looking at these systems can shed light on the processes of galaxy mass assembly and quenching of the star formation at early epochs. In order to address these questions, we aim to identify and characterize massive quiescent galaxies from z ∼ 2.5 out to the highest redshifts at which these systems can be found. The final purpose is to compare the results with the predictions of state-of-the-art semi-analytical models of galaxy formation and evolution. Methods. We defined observer-frame color–color diagrams to optimally select quiescent galaxies at z > 2.5 and applied them to the COSMOS2015 catalog. We refined the spectral energy distribution (SED) fitting analysis for the selected candidates to confirm their quiescent nature, then derived their number density, mass density, and stellar mass functions. Finally, we compared the results with previous observations and some current semi-analytic models. Results. We selected candidates for quiescent galaxies in the redshift range 2.5 ≲ z ≲ 4.5 from the COSMOS2015 catalog by means of two color–color diagrams. The additional SED fitting analysis allowed us to select 128 galaxies, consistent with being massive (log(M*/M⊙)≥10.6), old (ages ≳0.5 Gyr), and quiescent (log(sSFR [yr−1]) ≤ −10.5) objects at high redshift (2.5 < z < 4.5). Their number and mass densities are in fair agreement with previous observations and, if confirmed, show a discrepancy with current semi-analytical models of galaxy formation and evolution, that underpredict the number of massive quiescent systems up to a factor of ∼12 at 2.5 ≤ z < 3.0 and ∼10 at z ∼ 4.0. The evolution of the stellar mass functions (SMFs) of these systems is similar to previous estimates and indicates a disagreement with models, particularly with regard to the shape of the SMF. Conclusions. The present results add further evidence to the possibility that massive and quiescent galaxies can exist out to at least z ∼ 4. If future spectroscopic observations carried out with, for example, the James Webb Space Telecope (JWST), confirm the substantial presence of such a population, further work on modeling the stellar mass assembly, as well as supermassive black hole accretion and feedback processes at early cosmic epochs, is needed to understand how these systems formed, evolved, and quenched their star formation.
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Buser, Roland, and Jianxiang Rong. "Metallicity Structures of the Milky Way." Symposium - International Astronomical Union 169 (1996): 427–28. http://dx.doi.org/10.1017/s0074180900230040.
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The metallicity-sensitive (U – G) colors from the new homogeneous catalog of photographic RGU data in seven high-latitude fields have been used to determine the larger-scale metallicity distributions of the Galactic population components. For the thick disk, preliminary analysis based on our best structural models provides a mean metallicity 〈[M/H]〉 = −0.6 ± 0.3dex and a marginal vertical metallicity gradient ≈ −0.1dex/kpc. The observed color distributions are further consistent with the (old) thin disk having mean abundance 〈[M/H]〉 = −0.3 ± 0.2dex and abundance gradient ∂[M/H]/∂z = −0.6dex/kpc.
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Lewis, B. M. "Miras Without Masers are Symbiotic Stars." International Astronomical Union Colloquium 135 (1992): 241–43. http://dx.doi.org/10.1017/s0252921100006485.
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AbstractAbout 40% of potential OH / IR stars, color selected from the IRAS Point Source Catalog, have no 1612 MHz masers. While these objects are rarely carbon rich, they are usually associated with circumstellar shells. The natural explanation for these “OH / IR star color mimics” is that they are systems with a degenerate companion collecting an accretion disk from a red giant wind. This provides them with an extra source of UV for dissociating their molecules. The persistent absence of the usual complement of masers from an O-rich shell is then a pointer to the presence of a degenerate companion. These occur in association with ~45% of old giant stars.
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Law, Casey J., Kritti Sharma, Vikram Ravi, Ge Chen, Morgan Catha, Liam Connor, Jakob T. Faber, et al. "Deep Synoptic Array Science: First FRB and Host Galaxy Catalog." Astrophysical Journal 967, no. 1 (May 1, 2024): 29. http://dx.doi.org/10.3847/1538-4357/ad3736.
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Abstract Fast radio bursts (FRBs) are a powerful and mysterious new class of transients that are luminous enough to be detected at cosmological distances. By associating FRBs to host galaxies, we can measure intrinsic and environmental properties that test FRB origin models, in addition to using them as precise probes of distant cosmic gas. The Deep Synoptic Array (DSA-110) is a radio interferometer built to maximize the rate at which it can simultaneously detect and localize FRBs. Here, we present the first sample of FRBs and host galaxies discovered by the DSA-110. This sample of 11 FRBs is the largest, most uniform sample of localized FRBs to date, as it is selected based on association with host galaxies identified in optical imaging by Pan-STARRS1. These FRBs have not been observed to repeat, and their radio properties (dispersion, temporal scattering, energy) are similar to that of the known nonrepeating FRB population. Most host galaxies have ongoing star formation, as has been identified before for FRB hosts. Two hosts of the new sample are massive, quiescent galaxies. The distribution of star formation history across this host-galaxy sample shows that the delay time distribution is wide, with a power-law model that spans from ∼100 Myr to ≳2 Gyr. This requires the existence of one or more progenitor formation channels associated with old stellar populations, such as the binary evolution of compact objects.
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Marquis, Kathy. "Peter Devereaux and Carla Diane Hayden. The Card Catalog: Books, Cards, and Literary Treasures." RBM: A Journal of Rare Books, Manuscripts, and Cultural Heritage 19, no. 1 (May 17, 2018): 71. http://dx.doi.org/10.5860/rbm.19.1.71.
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In an early archives job, I typed the name and subject entries at the top of card sets we received from the Library of Congress. It was exacting work and I really enjoyed it, including the filing. At a venerable manuscript repository, the cards ranged from the printed ones I placed on top of the rods (to be double-checked before they slipped into their forever homes) and those written in a spidery handwriting that could easily have been 100 years old. It made me feel part of a long tradition of information mavens.
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Kumkova, Irina I., Vadim V. Bobylev, and Nina M. Bronnikova. "Densification of ICRS in the Optical by use of Old Pulkovo Observation Sets." International Astronomical Union Colloquium 180 (March 2000): 61–67. http://dx.doi.org/10.1017/s0252921100000117.
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AbstractModern tasks of high precision astrometry demand optical coordinate systems including more faint stars than are available now in current conventional systems (Hipparcos). For this purpose it is suggested to use old photographic observations accumulated in the Pulkovo Observatory. Extensive observational data have been obtained at Pulkovo Observatory during the last century in the framework of several programs, e.g. Pulkovo Galaxy plan, etc. Observations have been made with the Normal Astrograph from 1894 to the present. The data are investigated with the aim of extending the Hipparcos catalog to stars fainter than 11th magnitude. All available observations are taken into account. A description of the material considered is given. The distribution of the selected plates over the celestial sphere is shown as well. Coordinates of faint stars in the Hipparcos system are calculated for selected areas. The accuracy of computed star coordinates is analyzed. Results of the investigation are presented.
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TIAN, JIAHUI, and LIHONG TU. "A new species of the spider genus Solenysa from China (Araneae, Linyphiidae)." Zootaxa 4531, no. 1 (December 11, 2018): 142. http://dx.doi.org/10.11646/zootaxa.4531.1.10.
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The genus Solenysa Simon, 1894 belongs to Linyphiidae Blackwall, 1859, which is a species-rich group, including 608 genera and 4,571 species (World Spider Catalog 2018). Solenysa currently includes 14 species from China, Japan and the Korean Peninsula (Simon 1894; Namkung 1986; Li & Song 1992; Gao, Zhu & Sha 1993; Tu, Ono & Li 2007; Ono 2011; Tu & Hormiga 2011; Wang, Ono & Tu 2015). The linyphiid phylogeny based on molecular data shows that Solenysa species forms one of the seven main clades within Linyphiidae (Wang et al. 2015). According to the phylogenetic analysis based on morphological data, Tu and Hormiga (2011) divided the genus Solenysa into four species groups, each having a unique genital type comprised by series genital characters. As an old branch with a long evolutionary history, Solenysa spiders have accumulated a long list of synapomorphies (Tu & Hormiga 2011), not only having a unique somatic appearance, but also specific genitalic characters that distinguish them from all other linyphiids.
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Lin, Zehao, Ye Xu, Ligang Hou, Dejian Liu, Yingjie Li, Chaojie Hao, Jingjing Li, and Shuaibo Bian. "Local Spiral Structure Traced by Red Clump Stars." Astrophysical Journal 931, no. 1 (May 1, 2022): 72. http://dx.doi.org/10.3847/1538-4357/ac67a6.
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Abstract Using the cross-matched data of Gaia EDR3 and the Two Micron All Sky Survey Point Source Catalog, a sample of RC stars with parallax accuracies better than 20% is identified and used to reveal the nearby spiral pattern traced by old stars. As shown in the overdensity distribution of RC stars, there is an arc-like feature extending from l ∼ 90° to ∼243°, which passes close to the Sun. This feature is probably an arm segment traced by old stars, indicating the galaxy potential in the vicinity of the Sun. With a comparison to the spiral arms depicted by young objects, we found that there are considerable offsets between the two different components of the Galactic spiral arms. The spiral arm traced by RC stars tends to have a larger pitch angle, and hence a more loosely wound pattern.
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Cisterna-Concha, Andrea, Camila Calderón-Quirgas, Fernanda Silva-Andrades, Richard Muñoz, and Heraldo V. Norambuena. "Reencounter with the past: occurrence of sei whale (Balaenoptera borealis) in an old hunting area in the south-eastern Pacific Ocean." Nature Conservation 51 (January 26, 2023): 1–12. http://dx.doi.org/10.3897/natureconservation.51.95690.
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The sei whale (Balaenoptera borealis) was intensively exploited throughout its range, with about 110.000 individuals hunted by pelagic fleets in Antarctic waters between 1960 and 1970. In addition, basic information on its distribution, migratory routes, and feeding grounds in the southeastern Pacific, has been poorly documented. In the case of Chile, recent information consists mainly of accidental records. This research presents the first sei whale photo-identification catalog for south-central Chile. From November 2019 to January 2020, 88 individuals were recorded from land-based and boat surveys at Caleta Chome. Of these, 12 individuals were photo-identified through scars or distinctive notches in the dorsal fins. The peak of sightings occurred during December 2019; two individuals were sighted on more than one occasion.
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Khomutov, Sergey Y., and Manjula Lingala. "Some problems with old magnetic data processing." E3S Web of Conferences 196 (2020): 02029. http://dx.doi.org/10.1051/e3sconf/202019602029.
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Continues magnetic measurements at the IKIR FEB RAS obser-vatories Magadan (MGD), Paratunka (PET), Yuzhno-Sakhalinsk (YSS), Cape Schmidt (CPS) and Khabarovsk (KHB) and CSIR-NGRI observatories Hyder-abad (HYB) and Choutuppal (CPL) have been started almost since their formation. A significant part of the results obtained is presented in the WDC and INTERMAGNET databases. However, a large amount of raw data remains un-processed and unavailable for using by scientific community. In the past few years, institutes has been making efforts to process and reprocess old magnetic data. Digital images of analog magnetograms of the Observatory Paratunka since 1967 were obtained and the possibility of their use for calculation hourly and minute values of magnetic field elements was evaluated. Old digital data that was available during the conversion from analog to digital magnetometers is processed. The main problem of processing or re-processing archived data is the lack of information (metadata) about the measurement conditions. First of all, these are the results of absolute observations, which are necessary to obtain the values of the elements of the total field vector. In this paper, some technologies are proposed that allow to use the data obtained during processing of analog magnetograms to adjust the digital magnetometers records. A signif-icant problem is the lack or inaccuracy of information about the temperature conditions in the variation pavilion, about magnetometers or support equipment maintenance or about works in and near the pavilions. As we accumulate the experience during the processing of old magnetic data, a “catalog” of noise and its typical images is formed. This makes it more reliable and efficient to identify and remove this noise from records.
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Verdu-Candela, Alvaro, Carmen Femenia-Ribera, Gaspar Mora-Navarro, and Rafael Sierra-Requena. "Implementation of Web Map Services for Old Cadastral Maps." ISPRS International Journal of Geo-Information 12, no. 10 (October 10, 2023): 413. http://dx.doi.org/10.3390/ijgi12100413.
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It is widely accepted that old cadastral maps have multiple uses, such as reestablishing cadastral parcel boundaries, municipality boundaries, and coastal limits, or conducting historical, economic, and social studies. In Spain, the Directorate General for Cadastre, and the National Geographic Institute, has numerous digitized old maps that are accessible to users. In the Comunidad Valenciana, the georeferencing of certain series of old cadastral maps is being carried out in phases, which is one of the subjects of this study. A metric analysis of two series of old cadastral maps from a municipality was conducted. One of the series was georeferenced by the Valencia Provincial Cadastre Office, while the other was georeferenced in this research. Additionally, a spatial data infrastructure (SDI) was created, providing WMS, catalog, and document download services. Metadata were also published, containing information about the source, digitalization process, georeferencing, and achieved accuracy, following the ISO 19115 standard for geographic metadata. Furthermore, through individual and group interviews, participatory social research was conducted, to assess the use of old cadastral maps and the created SDI services, aiming to understand the users’ appreciation of the services. The results of the social research indicate that the SDI services created are highly valued, but certain conditions need to be met to ensure their effective use by the general public in order to avoid misuses and misinterpretations.
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Zhong, Jing, Li Chen, Di Wu, Lu Li, Leya Bai, and Jinliang Hou. "Exploring open cluster properties with Gaia and LAMOST." Astronomy & Astrophysics 640 (August 2020): A127. http://dx.doi.org/10.1051/0004-6361/201937131.
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Context. In Gaia DR2, an unprecedented high level of precision has been reached at sub-milliarcsecond for astrometry and millimagnitudes for photometry. Using cluster members identified with the astrometry and photometry in Gaia DR2, we can obtain a reliable determination of cluster properties. However, because of the shortcomings of Gaia spectroscopic observations in dealing with densely crowded cluster regions, the RVs and metallicity values for cluster member stars from Gaia DR2 are still lacking. It is necessary to combine the Gaia data with the data from large spectroscopic surveys, such as LAMOST, APOGEE, GALAH, and Gaia-ESO. Aims. In this study our aim is to improve the cluster properties by combining the LAMOST spectra. In particular, we provide the list of cluster members with spectroscopic parameters as an add-value catalog in LAMOST DR5, which can be used to perform a detailed study for a better understanding of the stellar properties, by using their spectra and fundamental properties from the host cluster. Methods. We cross-matched the spectroscopic catalog in LAMOST DR5 with the identified cluster members in Cantat-Gaudin et al. (2018, A&A, 618, A93). We then used members with spectroscopic parameters to derive statistical properties of open clusters. Results. We obtained a list of 8811 members with spectroscopic parameters and a catalog of 295 cluster properties. The provided cluster properties include astrometric parameters, spectroscopic parameters, derived kinematic and orbital parameters, and isochrone fitting results. In addition, we study the radial and vertical metallicity gradient and age-metallicity relation with the compiled open clusters as tracers, finding slopes of −0.053 ± 0.004 dex kpc−1, −0.252 ± 0.039 dex kpc−1, and 0.022 ± 0.008 dex Gyr−1, respectively. The slopes of the metallicity distribution relation for young clusters (0.1 Gyr < Age < 2 Gyr) and the age-metallicity relation for clusters within 6 Gyr are both consistent with the literature results. In order to fully study the chemical evolution history in the disk, more spectroscopic observations for old and distant open clusters are needed for further investigation.
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Westerhout, Gart. "Archiving of Data in Positional Astronomy." Highlights of Astronomy 9 (1992): 711–12. http://dx.doi.org/10.1017/s1539299600010121.
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Astrometry is the oldest of the astronomical endeavors. Indeed, we still have the observing journals of Galileo, the journals of Flamsteed, and those of most of the other old transit-circle astronomers. We have most of the early photographic plates taken for the astrographic catalog project, and almost all the parallax plates. However, as technology progressed, we have become somewhat less precise in recording what we did. It is for this reason that this joint meeting was called: to impress on the modern astronomer that, in general, he only extracts a fraction of the information from his observations, and that these observational data may, in the future, provide an invaluable source needed for the progress of the science.
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Bo, M. Del, M. G. Lattanzi, G. Massone, F. Porcu, F. Salvati, G. L. Deiana, A. Poma, and S. Uras. "The TOCAMM Project." International Astronomical Union Colloquium 178 (2000): 317–20. http://dx.doi.org/10.1017/s0252921100061431.
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AbstractThe TOCAMM (TOrino CAgliari Measuring Machine) project undertaken jointly between Torino and Cagliari Astronomical Observatories aimed to convert the old measuring machine ASCORECORD into an automatic and impersonal one. This program is intended to contribute to the link of the HIPPARCOS Catalogue to the ICRS through the determination of precise position of optical counterparts of 80 extragalactic radiosources taken from the IERS list and to investigate the astrometric accuracy of the Guide Star Catalog (version 1 and 2). The calibration test phase, carried out first at the Astronomical Observatory of Torino and after at Cagliari Observatory, where the machine has been now installed, indicate that the available positional accuracy is about 0.5 microns in both x and y coordinates.
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Lépine, Sébastien. "Where the Wild Young M Dwarfs Are: the SUPERBLINK Proper Motion Survey and a Search for Low-mass Moving Group Candidates." Proceedings of the International Astronomical Union 10, S314 (November 2015): 69–70. http://dx.doi.org/10.1017/s1743921315006365.
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AbstractThe SUPERBLINK survey catalogs all stars brighter than R = 19 mag and with proper motions larger than 40 mas yr−1, down to a declination of −33○. The catalog inevitably includes a significant fraction of the presumed low-mass members of several nearby young moving groups (Beta Pic, AB Dor, Tuc-Hor, Argus), or low-mass escapees from the Hyades and Pleiades clusters. We discuss opportunities and challenges in identifying the missing M dwarf members of these moving groups. While rounding up the majority of the potential M dwarf members of these groups, such samples are significantly affected by co-moving field stars, both young and old, due to the heavy clumping of the local field population in velocity space.
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Barmby, P., and M. Rafiei Ravandi. "Stellar populations in the outskirts of M31: the mid-infrared view." Proceedings of the International Astronomical Union 11, S321 (March 2016): 19–21. http://dx.doi.org/10.1017/s1743921316011054.
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AbstractThe mid-infrared provides a unique view of galaxy stellar populations, sensitive to both the integrated light of old, low-mass stars and to individual dusty mass-losing stars. We present results from an extended Spitzer/IRAC survey of M31 with total lengths of 6.6 and 4.4 degrees along the major and minor axes, respectively. The integrated surface brightness profile proves to be surprisingly difficult to trace in the outskirts of the galaxy, but we can also investigate the disk/halo transition via a star count profile, with careful correction for foreground and background contamination. Our point-source catalog allows us to report on mid-infrared properties of individual objects in the outskirts of M31, via cross-correlation with PAndAS, WISE, and other catalogs.
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Legomska, Julia. "Od czarów nad kołyską do magii językowej usieciowionej matki — ciągłość i zmienność charakteru magii języka matek." Język a Kultura 26 (February 22, 2017): 245–57. http://dx.doi.org/10.19195/1232-9657.26.20.
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From spells over the cradle to linguistic magic of a networked mother — continuity and change of the nature of mothers’ language magic The essay draws attention to the fact that, since the old days, in the case of frustration connected with the child mothers have reached out for words, they have used words to affect both internal, psychic reality and the external one. Magical acts by means of language are based on the world image shared by the sender and the recipient. Polish folk culture positively valued phenomena referring to Polish Catholic symbols, therefore these symbols constitute protective and benevolent powers evoked in folk lullabies. The author suggests looking at contemporary linguistic activities performed by mothers frustrated with staying with the child, which activities are presented in the analysed website magazine Bachor as activities which also make use of the language magic. According to the author, the difference lies in changing the cultural context of linguistic behaviour and associating them in particular with the defining technology. In contemporary mediatised society the power of “obligatory existence”, which was characteristic of magical speech activities, supports and intensifies the equation of media by recipients. Therefore, the author sees Bachor as the act of blocking the language of success which makes room only for parents who are “effective” and affirm positive feelings by introducing into reality — by means of words, words in media — incapable, frustrated parents who are full of negative feelings. The subject is discussed in adescriptive and not in an evaluative way.
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van Reijmersdal, Eva A., Esther Rozendaal, and Moniek Buijzen. "Boys’ responses to the integration of advertising and entertaining content." Young Consumers 16, no. 3 (August 17, 2015): 251–63. http://dx.doi.org/10.1108/yc-10-2014-00487.
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Purpose – The purposes of this paper are to investigate the effects of integrated advertising formats on the persuasion of children, children’s awareness of the persuasive intent of these formats and how this awareness mediates the level of persuasion. Design/methodology/approach – An one-factor between-subjects experiment was conducted among 117 boys from 8 to 12 years old. Findings – This study showed that boys were more aware of the persuasive intent of a non-integrated catalog than of a brand-integrated magazine. In addition, higher awareness of the persuasive intent of the catalog enhanced persuasion in boys. Research limitations/implications – This study only focused on boys’ responses and not on girls. Practical implications – Findings imply that advertisers could focus on non-integrated print advertising formats, such as catalogs, to promote positive product attitudes among boys. Catalogs are also a more ethical way of communicating to boys because boys are generally aware of catalogs’ persuasive intent. Social implications – This study implies that even if children have sufficient persuasion knowledge, they do not necessarily use it to critically evaluate advertising. Originality/value – This paper is the first to systematically test the differences in effects of brand-integrated magazines versus catalogs targeted toward children. Importantly, it shows that persuasion knowledge plays a fundamentally different role in the persuasion process of children than of adults: awareness of the persuasive intent of catalogs increases persuasion among boys, whereas previous studies among adults showed opposite results.
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Davis, Marc, and Adi Nusser. "Re-examination of Large Scale Structure & Cosmic Flows." Proceedings of the International Astronomical Union 11, S308 (June 2014): 310–17. http://dx.doi.org/10.1017/s1743921316010061.
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AbstractComparison of galaxy flows with those predicted from the local galaxy distribution ended as an active field after two analyses came to vastly different conclusions 25 years ago, but that was due to faulty data. All the old results are therefore suspect. With new data collected in the last several years, the problem deserves another look. The goal is to explain the 640 km/s dipole anisotropy of the CMBR. For this we analyze the gravity field inferred from the enormous data set derived from the 2MASS collection of galaxies (Huchra et al. 2005), and compare it to the velocity field derived from the well calibrated SFI++ Tully-Fisher catalog (Springob et al. 2007). Using the “Inverse Method” to minimize Malmquist biases, within 10,000 km/s the gravity field is seen to predict the velocity field (Davis et al. 2011) to remarkable consistency. This is a beautiful demonstration of linear perturbation theory and is fully consistent with standard values of the cosmological variables.
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Pascal, A. D. "Cyrillic writing system: from Slavic to Romanian." Proceedings of SPSTL SB RAS, no. 3 (September 17, 2020): 5–10. http://dx.doi.org/10.20913/2618-7515-2020-3-5-10.
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The article is devoted to Cyrillic handwritten books of the XIII–XIX centuries, created in the Romanian principalities, and stored today in the manuscript collections of the Russian State Library. The uniqueness of the writing system, functioning in the principalities (Wallachia, Moldavia, Transylvania) since their political formation, is that it was a Cyrillic script based on the old Slavic language with a predominant Roman-speaking population. In course of the writing system’ development in the principalities, there was a transition from the Slavic font to the Latin one; the intermediate result of this transition was the creation of monuments written in Romanian language with Cyrillic script. The main stages of this process are considered by reference to the specific examples of unique handwritten books and their fragments that have become objects for collecting by scientists, antiquaries, and Old Believers, whose book collections have formed the basis of the handwritten collections of the Russian State Library. They are the oldest Cyrillic manuscripts and their fragments dated to the XII–XIV centuries, found on the territory of Romania, Slavic manuscripts, produced mainly in monasteries of principalities in the XV–XVII centuries, translations of individual words into the Romanian language in the rewritten Slavic texts in the XVI century; the glosses and comments in Romanian on the margins of Slavic manuscripts in the XVI–XVIII centuries; numerous notes in the Romanian language in the manuscripts of the XVI–XVIII centuries, made by owners and readers; translations of literary monuments, including bilingual (Slavic–Romanian) and trilingual (Slavic–Latin–Romanian) versions in the XVI–XVIII centuries; Romanian–Slavic and Slavic–Romanian dictionaries in the XVII–XVIII centuries; letters and their copies in the Romanian language (sureties) in the XVI–XIX centuries. The article is an intermediate outcome of studying and describing Cyrillic Romanian handwritten books in the collections of the Russian State Library, which will result in the publication of a hard–copy catalog.
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Calienes, Raúl Fernández. "Bibliography of the Writings of Orlando E. Costas." Missiology: An International Review 17, no. 1 (January 1989): 87–105. http://dx.doi.org/10.1177/009182968901700111.
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During his life, the Rev. Dr. Orlando E. Costas made significant contributions to the literature of missiology and theology. Though he was only 45 years old at the time of his death, he personally authored over 100 books and articles, and made over thirty contributions (e.g., chapters, articles, prologues) to the books of other people from around the world. His own interests were varied, but centered mostly on mission, evangelism, and Latin America. This bibliography is an attempt to collect and record his writings, all in one place. It is offered as a tribute to his life and ministry. Wherever possible, searching aids have been included. Examples are the Library of Congress cataloguing numbers (for most of the books) and the Reigner Recording Library Catalog numbers (for the sound recordings at the Union Theological Seminary, Richmond, Virginia).
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Fuchs, B., C. Dettbarn, and R. Wielen. "The Scatter of Metallicities of Stars in the Solar Neighbourhood." Symposium - International Astronomical Union 169 (1996): 431–32. http://dx.doi.org/10.1017/s0074180900230064.
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It is well known that the velocity dispersions of the stars in the solar neighbourhood increase with their ages (Wielen 1977). In Fig.1 we show |W| weighted velocity dispersions (cf. Wielen 1977) of the stars in the Third Catalog of Nearby Stars (Gliese and Jahreiß 1994). Open symbols indicate main sequence stars and crosses indicate McCormick stars, a kinematically unbiased subset of the CNS3, respectively, whereas the filled symbols are the Edvardsson et al. (1993) data. Stars older than 14 Gyr are not shown because they are probably thick disk stars (Freeman 1991). We have assumed a maximum age of the old thin disk stars of 12 Gyr as suggested by the Edvardsson et al. data. As can be seen from Fig.1 both data sets fit ideally together. The solid line indicates a σ ∝ τ1/2 law.
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Usenko, I. A., A. S. Miroshnichenko, S. Danford, D. G. Turner, D. J. Majaess, and D. D. Balam. "SPECTROSCOPIC INVESTIGATIONS OF POLARIS FIELD STARS." Odessa Astronomical Publications 36 (December 4, 2023): 88–95. http://dx.doi.org/10.18524/1810-4215.2023.36.290534.
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We present the results of an analysis of 28 spectra of 18 Polaris field A–G V stars obtained in 2016–2023. Derived radial velocities and Teff along with distances and reddenings from the Gaia DR3 catalog allowed us to calculate radii of the stars and compare them with calibration relationships “Spectral type – Luminosity” for MS stars. As a result, radii and distances for 9 stars were found overestimated compared to those determined photometrically. Therefore, the DR3 distances are unreliable and should be revisited. According to our data for these stars and their photometric distances, 15 objects belong to a possible old open cluster that is currently dissolved in the Polaris field at a distance ∼70–110pc, while two objects belong to the thick disk, and one belongs to a possible another star group located at a distance of 130 pc.
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Leal Rodrigues, Sofia. "“Vision in motion”: László Moholy-Nagy and the Genesis of the Visual Book." Disegno, no. 1-2 (2021): 86–109. http://dx.doi.org/10.21096/disegno_2021_1-2slr.
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This essay aims to analyze the ways in which László Moholy-Nagy’s concepts of “new typography” and “typophoto” were essential to the creation of a new typology of publications: visual books, which have a strong image component, resulting from the popularization of photography and cinema. New typography was defined in 1923 by László Moholy-Nagy in a short text for the catalog of the Bauhaus exhibition Staatliches Bauhaus in Weimar 1919–1923. New typography resulted from a new graphical orientation by Bauhaus, influenced by the ideology of several avant-garde movements, such as De Stijl and Russian Constructivism, that celebrated simplification, geometrization and the advantages of modern technology to construct a visual language that could communicate clearly and in a universal manner. In Moholy-Nagy’s text, new typography called for an analysis of the relation between form and content through the collapsing of the “classic model” (the “old typography”) and the objective use of photography. In 1925, Moholy-Nagy introduced the notion of typophoto in Painting, Photography, Film to realize the “bioscopic book” of El Lissitzky, which is more visual than textual. In publications like the exhibition catalog Staatliches Bauhaus in Weimar 1919–1923 or the Bauhausbücher series, Moholy-Nagy puts both principles into practice, converting the book into a space of visual exploration, endowed with a cinematic dimension that comes close to his notion of “vision in motion”. Through the use of a qualitative research methodology, and based on a critical review of literature and the direct observation of case studies, this essay aims to show how Moholy-Nagy’s multidisciplinary legacy contributed to a paradigm shift in book design.
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Biswas, Pralay, and Yogesh Wadadekar. "Structure and Kinematics of Star-forming Elliptical Galaxies in SDSS-MaNGA." Astrophysical Journal 970, no. 1 (July 1, 2024): 83. http://dx.doi.org/10.3847/1538-4357/ad4ee3.
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Abstract Using “spatially” resolved spectroscopy, we investigated the characteristics and different modes of formation of stars in elliptical galaxies. We identified an unusual population of 59 star-forming elliptical (SF-E) galaxies in SDSS-MaNGA, our primary sample. To identify these rare star-forming ellipticals, we combined GSWLC-A2 containing outputs of stellar population synthesis models with morphological results from the deep-learning catalog and resolved and integrated properties from the MaNGA Pipe3D value-added catalog. We have also constructed two control samples of star-forming spirals (SF-Sps; 2419 galaxies) and quenched ellipticals (Q-Es; 684 galaxies) to compare with our primary sample of SF-Es. Hα emission line flux of SF-Es is similar to spiral galaxies. The D4000 spectral index indicates that SF-Es have a mixture of old and young stellar populations. Mass-weighted stellar age and metallicity for the SF-Es are lower than the Q-Es and 67% of stellar- and gas-velocity maps of the primary sample show signs of kinematic disturbance. All of these indicate that SF-Es have acquired metal-poor gas through recent mergers or interactions with other galaxies and are forming a new generation of stars. Further, we subdivide our primary sample of SF-Es into four classes based on their bulge to total luminosity ratio (B/T) and spin parameter λ re . These four classes have their distinct evolutionary history and modes of formation. Based on these results, we suggest that the Hubble diagram does not accurately capture galaxy evolution processes, and we need a revised morphology diagram like the comb morphology diagram to get a complete picture of the galaxy evolution processes.
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Mogheisi, Meisam, Hamidreza Tavakoli, and Elnaz Peyghaleh. "Probability Assessment of the Seismic Risk of Highway Bridges with Various Structural Systems (Case Study: Tehran City)." Sustainability 15, no. 12 (June 19, 2023): 9783. http://dx.doi.org/10.3390/su15129783.
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Considering the development of urban transportation systems and the importance of highway bridges in a city’s resilience against earthquakes, it is critical to pay special attention to the seismic risk evaluation of highway bridges. The most significant issue to consider is the assessment of possible direct and indirect damages imposed on bridges before an earthquake. After this, the best practices for bridge rehabilitation can be adopted to minimize the induced damage. In this paper, we assessed the seismic risks associated with all 713 highway bridges in Tehran province (the capital of Iran). These bridges were initially divided into six categories according to their structural system and construction year and were also classified by whether or not seismic design was included. Among the 84,000 earthquakes recommended by the researchers’ ten-thousand-year catalog, a set of 50 ground motion records was selected in the course of a probabilistic approach via the Optimization-based Probabilistic Scenarios (OPS) algorithm in an attempt to obtain the least amount of error compared to the original catalog in the final hazard curve in different regions of Tehran province. Afterward, the seismic fragility curves were plotted in four damage states of slight, moderate, extensive, and complete for the six bridge structural systems of simple, steel, concrete slab box, concrete slab–steel box, concrete slab, and steel girder–concrete slab. The results of the fragility curves extracted from the decision tree analysis were validated with those developed from incremental dynamic analysis (IDA) for a bridge case study modeled in the OpenSEES software V2.5.0. Later, using logical relationships, seismic risk curves were drawn for each structural system. The results show that, in general, the average seismic damage of bridges over ten years old is 0.88 times the average damage of bridges less than ten years old. The highest level of vulnerability is associated with the simple bridge system with a median vulnerability of 0.44. Moreover, the lowest level of vulnerability is related to the steel girder–concrete slab bridge system with a median vulnerability of 0.98, showing an increase of approximately 2.2 times in the median vulnerability. In addition, based on the sensitivity analysis results, the indirect and total risk levels increase almost exponentially with increasing the reconstruction index.
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Benkortem, Saruta, Nahathai Tanakul, and Chutipong Suwannajak. "RR Lyrae analysis in the Local Group globular clusters and dwarf galaxies." Proceedings of the International Astronomical Union 14, S351 (May 2019): 56–59. http://dx.doi.org/10.1017/s1743921319007336.
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AbstractRR Lyrae variables are powerful tools to study their host stellar populations. Globular clusters and dwarf galaxies are old and usually host this type of variables. With a growing number of low luminosity objects discovered in the halo of the Milky Way, classifying stars clusters and galaxies has become more challenging. In this study, we examine the properties of RR Lyrae stars in globular clusters and dwarf galaxies in the Local Group. We construct a catalog of RR Lyrae variables in the Local Group globular clusters and dwarf galaxies from previously published data and compare the properties of RR Lyrae variables between those two types of stellar systems. Our goal is to search for a physical difference in the properties of RR Lyrae variables in those two classes of stellar systems. We also analyze the global trend of RRLs in these systems to understand more about their formation and evolution history.
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van Altena, William F., Vladimir I. Korchagin, Terrence M. Girard, Dana I. Dinescu, and Tatiana V. Borkova. "Galactic Disk Surface Density in the Solar Neighbourhood." Symposium - International Astronomical Union 220 (2004): 201–6. http://dx.doi.org/10.1017/s0074180900183214.
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Using parallaxes and proper motions of a kinematically and spatially unbiased sample of old bright red giant stars from the Hipparcos catalog with measured radial velocities from Barbier-Brossat & Figon (2000), we have re-estimated the surface density of the Galactic disk in the solar neighbourhood within ±0.4 kpc of the Sun. We determine the vertical distribution of the red giants as well as the vertical velocity dispersion of the sample, (14.4±0.26 km/sec), and combine these to derive the surface density of gravitating matter in the Galactic disk. Using these data, we determine the surface density of the galactic disk as a function of the galactic coordinate, z. the surface density of the disk increases from 10.5 ±0.5 M⊙within ±50 pc to 42 ±6 M⊙/pc2 within ±350 pc. The volume density of the galactic disk within ±50 pc is 0.105±0.005 M⊙/pc3, which is only marginally greater (within 2 sigma) than the volume density estimates of observed baryonic matter in the solar neighbourhood.
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LEVKO, Oleksandr. "Formation of the Ukrainian religious and ethical lexicon in the 16th and 17th centuries (based on the Epistle to Galatians)." Linguistic and Conceptual Views of the World, no. 74 (2) (2023): 72–89. http://dx.doi.org/10.17721/2520-6397.2023.2.05.
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The article explores the origins of the Ukrainian language ethical lexicon in biblical written monuments of the early modern period. It traces the rendition of the vices and virtues catalog in the Epistle to the Galatians (Gal. 5:19–23) in the Krekhiv Apostle, a manuscript of the 2nd half of the 16th century, in comparison with the Church Slavonic Ostroh Bible of 1581, as well as lexicographical works of the 17th century, in particular Pamva Berynda’s “Lexicon”, and Ukrainian translations of the Bible of the 19th and 20th centuries. The Epistle to the Galatians contains one of the most extensive New Testament catalogs of ethical values/anti-values. The vices and virtues in Gal. 5:19–23 form axiological oppositions, which indicate the values of verbal, emotional, behavioral, and social interaction between members of society. The Krekhiv Apostle uses Old Ukrainian and Church Slavonic words to nominate virtues and vices in the Epistle to the Galatians. More than half of the words in the ethical catalog of Gal. 5:19–23 in the Krekhiv Apostle differ from the usage of the Ostroh Bible. Most of these words are indicated as belonging to the “prosta mova” in lexicographical works of the 17th century, in particular in Pamva Berynda’s “Lexicon”. Two thematic subgroups of ethical vocabulary denoting vices in Gal. 5:19–21, namely vices of the corporal and emotional-volitional spheres, show a high level of variability in usage of the Old Ukrainian words instead of Church Slavonicisms in written monuments of the early modern period. Ukrainian biblical translations of the 19th and 20th centuries – in particular those of Panteleimon Kulish, Ivan Levytskyi and Ivan Pului (1905), Ivan Ohiienko (1962), and Ivan Khomenko (1963) – inherited some of the words of the sixteenth- and seventeenth-century “prosta mova” to denote religious and ethical values/anti-values in Gal. 5:19–23, e. g., within the thematic groups of “debauchery”, “apostasy”, and “anger/discord”. The biblical written monuments of the early modern era laid the foundation for the traditions of Ukrainian Bible translation and paved the way for the formation of the Ukrainian linguistic usage in the field of religious communication.
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Tantalo, Maria, Massimo Dall’Ora, Giuseppe Bono, Peter B. Stetson, Michele Fabrizio, Ivan Ferraro, Mario Nonino, et al. "On the Dwarf Irregular Galaxy NGC 6822. I. Young, Intermediate, and Old Stellar Populations." Astrophysical Journal 933, no. 2 (July 1, 2022): 197. http://dx.doi.org/10.3847/1538-4357/ac7468.
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Abstract We present accurate and deep multiband (g, r, i) photometry of the Local Group dwarf irregular galaxy NGC 6822. The images were collected with wide-field cameras at 2 m/4 m (INT, CTIO, CFHT) and 8 m class telescopes (Subaru) covering a 2 deg2 field of view across the center of the galaxy. We performed point-spread function photometry of ≈7000 CCD images, and the final catalog includes more than 1 million objects. We developed a new approach to identify candidate field and galaxy stars and performed a new estimate of the galaxy center by using old stellar tracers, finding that it differs by 1.′15 (R.A.) and 1.′53 (decl.) from previous estimates. We also found that young (main sequence, red supergiants), intermediate (red clump, asymptotic giant branch (AGB)), and old (red giant branch) stars display different radial distributions. The old stellar population is spherically distributed and extends to radial distances larger than previously estimated (∼1°). The young population shows a well-defined bar and a disk-like distribution, as suggested by radio measurements, that is off-center compared with the old population. We discuss pros and cons of the different diagnostics adopted to identify AGB stars and develop new ones based on optical–near-IR–mid-IR color–color diagrams to characterize oxygen- and carbon-rich stars. We found a mean population ratio between carbon and M-type (C/M) stars of 0.67 ± 0.08 (optical/near-IR/mid-IR), and we used the observed C/M ratio with empirical C/M–metallicity relations to estimate a mean iron abundance of [Fe/H] ∼ −1.25 (σ = 0.04 dex), which agrees quite well with literature estimates.
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Bruch, Albert. "TESS Light Curves of Cataclysmic Variables. IV. A Synoptic View of Eclipsing Old Novae and Novalike Variables." Astrophysical Journal Supplement Series 273, no. 1 (June 26, 2024): 6. http://dx.doi.org/10.3847/1538-4365/ad43ec.
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Abstract Based mainly on the months-long 2 minutes time-resolution light curves observed by the Transiting Exoplanet Survey Telescope (TESS) space mission of 48 eclipsing old novae and novalike variables (commonly referred to as NLs) selected from the Ritter & Kolb catalog, a synoptic view of some basic properties of these systems is provided. The supraorbital variations exhibit a large diversity of behavior. Data taken from the literature and many additional eclipse epochs measured in the TESS and in AAVSO light curves are used to update the orbital ephemerides of 21 targets. The large majority of these suffer period variations which defy current theoretical understanding. Orbital waveforms are constructed and, if possible, their variation over time is studied, revealing some common characteristics but also substantial differences between individual systems. The dependence of the eclipse depth on the out-of-eclipse flux reveals that in all systems a fraction of the light source responsible for the out-of-eclipse variations escapes eclipse and is probably located in the outer disk regions. In systems exhibiting superhumps, both eclipse width and epoch are modulated with the accretion disk precession period. This suggests an expansion and contraction of the eclipsed light source, as well as a periodic shift of its light center as a function of the accretion disk precession phase. The dependence of the orbital and superhump waveforms on the disk precession phase is also examined but does not lead to a consistent picture. Two cataclysmic variables are newly identified as eclipsing. Attention is drawn to specific peculiarities in some of the target stars.
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Mohamad, M. S., W. A. W. Aris, N. J. Jaffar, and R. Othman. "SEISMIC STRAIN MAP IN MALAYSIA DERIVED FROM LONG-TERM GLOBAL POSITIONING SYSTEM DATA." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-4/W16 (October 1, 2019): 399–408. http://dx.doi.org/10.5194/isprs-archives-xlii-4-w16-399-2019.
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Abstract. Series of major earthquakes struck the Sundaland plate as a result of convergence with neighboring plates such as Indian, Australian and Philippine plates. Since then, the Sundaland is experiencing significant crustal deformation that implicate reactivation of local fault and embark question on the status of geohazard and seismic risk. In Malaysia, crustal deformation study by using Global Positioning System (GPS) has been conducted for many years. However, the information of crustal deformation was reported separately and difficult to be archived. In addition, continuous estimation of crustal deformation derived from GPS has to be carried out in order to provide present day seismic status. This study aims at generating a seismic catalog map in Malaysia derived from approximately nine (9) years of GPS data. In this study, derived long-term crustal deformation in the form of coordinate time series (CTS) were converted into yearly strain map. The changes of strain with respect to location of old and active fault line in Malaysia were properly analysed. From the result, the highest changes of strain rate for Peninsular Malaysia happened in 2004 until 2005 and 2012 until 2013 prior to 2004 Acheh earthquake event with the moment magnitude (Mw) and 2012 two strike-slip events in Northern Sumatera with the magnitude of 8.2Mw and 8.6Mw. In North Borneo region, the most significant changes of strain rate happened from 2007 to 2009 and 2011 to 2013. It can be expected that the results will be beneficial in augmenting geohazard mitigation in Malaysia.
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Ananda, Trie, Yusniah Yusniah, Febi Fadila, Nurul Ummi,, and Ummu Hoiriah Lubis. "Penerapan Pelayanan Perpustakaan Sistem Automasi Terintegrasi di Universitas Medan Area." Da'watuna: Journal of Communication and Islamic Broadcasting 2, no. 4 (November 27, 2022): 245–51. http://dx.doi.org/10.47467/dawatuna.v2i4.2424.
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In January 2017, the Medan Regional University Library (UMA) officially implemented an integrated automation system. The system is a migration from the old system that was used previously. Integrated library automation system using SLiMS Acacia version 8.3.1. With the implementation of this integrated automation, users can borrow, return, and expand their loan collection from the Medan University (UMA) branch library. Automated systems can also improve service quality and bring libraries closer to users. This study uses qualitative methods to conduct descriptive research. Descriptive research describes a picture or painting in a systematic, correct, and accurate manner, describing the facts, and the nature of the relationship between the phenomena studied. The technique of collecting data and information about all collections by researchers is in the form of observations by University librarians in the Medan area. The purpose of this research is to communicate to users what library materials the library has, provide bibliographic information, and document the characteristics of each library material, which are needed to identify and distinguish one library material from another. This will certainly help in the search for library collections, and the catalog serves as an important search tool.
Keywords: UMA Library, Integrated Library System.
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Ananda, Trie, Yusniah Yusniah, Febi Fadila, Nurul Ummi,, and Ummu Hoiriah Lubis. "Penerapan Pelayanan Perpustakaan Sistem Automasi Terintegrasi di Universitas Medan Area." Da'watuna: Journal of Communication and Islamic Broadcasting 3, no. 1 (November 27, 2022): 245–51. http://dx.doi.org/10.47467/dawatuna.v3i2.2424.
Full textAbstract:
In January 2017, the Medan Regional University Library (UMA) officially implemented an integrated automation system. The system is a migration from the old system that was used previously. Integrated library automation system using SLiMS Acacia version 8.3.1. With the implementation of this integrated automation, users can borrow, return, and expand their loan collection from the Medan University (UMA) branch library. Automated systems can also improve service quality and bring libraries closer to users. This study uses qualitative methods to conduct descriptive research. Descriptive research describes a picture or painting in a systematic, correct, and accurate manner, describing the facts, and the nature of the relationship between the phenomena studied. The technique of collecting data and information about all collections by researchers is in the form of observations by University librarians in the Medan area. The purpose of this research is to communicate to users what library materials the library has, provide bibliographic information, and document the characteristics of each library material, which are needed to identify and distinguish one library material from another. This will certainly help in the search for library collections, and the catalog serves as an important search tool.
Keywords: UMA Library, Integrated Library System.
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Gaivoronsky, Ivan V., Marina V. Tvardovskaya, Kirill V. Solovyev, Maria P. Kirillova, Tatyana S. Spirina, Stas V. Vinogradov, and Anastasia A. Semenova. "The skeleton of the giant Jacob Lolly is a unique “brand” of the department of normal anatomy." Bulletin of the Russian Military Medical Academy 24, no. 1 (April 20, 2022): 231–37. http://dx.doi.org/10.17816/brmma88968.
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The paper presents the history of the appearance of the legendary skeleton of the giant Jacob Lolli in the museum collection of the Department of Normal Anatomy of the Military medical Academy. Research has been conducted on archival documents, including old magazines, newspapers, monographs, and minutes of the Academy Conference meetings stored in the Russian National Library, as well as the catalog and card index of the fundamental museum of the department. Data at the time of making the giant skeleton given in the catalog of the fundamental museum and literary sources of the 19th century were quite different and refer to the period from 1814 to 1818. Probably, the giants corpse was taken to the Department of Anatomy and Physiology of the Imperial MedicalSurgical Academy to establish the cause of death. After a while, the skeleton was presented to the Academy Conference as a rare museum exhibit and presented to its president, Jacov Willie, who returned the skeleton to the department. From 1818 to 1824, the skeleton temporarily left the walls of the academy and was examined by I.V. Buyalsky in the home museum. After the scientific work, the skeleton was returned to the department; as a result of the research conducted by I.V. Buyalsky in 1847, the article Measure of the skeleton and the weight of the bones of the giant Jacob Lolly, was the only published scientific work on the skeleton of a giant. The measurements were translated into the modern system of units. A brief description of the giants skull as a vivid example of typical changes in acromegaly was made a hundred years later by A.P. Bystrov, an employee of the department, in the book, Past, present, future of man. Two hundred years after its construction, the giants skeleton needed restoration, including delicate cleaning, restoration of destroyed fragments, and replacement of the material to imitate the cartilaginous components of the skeleton. The restorers work process is described, and the result of their activity is presented.
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Devin, J., M. Lemoine-Goumard, M. H. Grondin, D. Castro, J. Ballet, J. Cohen, and J. W. Hewitt. "High-energy gamma-ray study of the dynamically young SNR G150.3+4.5." Astronomy & Astrophysics 643 (October 28, 2020): A28. http://dx.doi.org/10.1051/0004-6361/202038503.
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Aims. The supernova remnant (SNR) G150.3+4.5 was recently discovered in the radio band; it exhibits a shell-like morphology with an angular size of ~ 3°, suggesting either an old or a nearby SNR. Extended γ-ray emission spatially coincident with the SNR was reported in the Fermi Galactic Extended Source Catalog, with a power-law spectral index of Γ = 1.91 ± 0.09. Studying particle acceleration in SNRs through their γ-ray emission is of primary concern to assess the nature of accelerated particles and the maximum energy they can reach. Methods. Using more than ten years of Fermi-LAT data, we investigate the morphological and spectral properties of the SNR G150.3+4.5 from 300 MeV to 3 TeV. We use the latest releases of the Fermi-LAT catalog, the instrument response functions and the Galactic and isotropic diffuse emissions. We use ROSAT all-sky survey data to assess any thermal and nonthermal X-ray emission, and we derive minimum and maximum distance to G150.3+4.5. Results. We describe the γ-ray emission of G150.3+4.5 by an extended component which is found to be spatially coincident with the radio SNR. The spectrum is hard and the detection of photons up to hundreds of GeV points towards an emission from a dynamically young SNR. The lack of X-ray emission gives a tight constraint on the ambient density n0 ≤ 3.6 × 10−3 cm−3. Since G150.3+4.5 is not reported as a historical SNR, we impose a lower limit on its age of t = 1 kyr. We estimate its distance to be between 0.7 and 4.5 kpc. We find that G150.3+4.5 is spectrally similar to other dynamically young and shell-type SNRs, such as RX J1713.7−3946 or Vela Junior. The broadband nonthermal emission is explained with a leptonic scenario, implying a downstream magnetic field of B = 5 μG and acceleration of particles up to few TeV energies.
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Braga, V. F., A. Bhardwaj, R. Contreras Ramos, D. Minniti, G. Bono, R. de Grijs, J. H. Minniti, and M. Rejkuba. "Structure and kinematics of Type II Cepheids in the Galactic bulge based on near-infrared VVV data." Astronomy & Astrophysics 619 (November 2018): A51. http://dx.doi.org/10.1051/0004-6361/201833538.
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Context. Type II Cepheids (T2Cs) are radially pulsating variables that trace old stellar populations and provide distance estimates through their period-luminosity (PL) relation. Aims. We trace the structure of old stellar population in the Galactic bulge using new distance estimates and kinematic properties of T2Cs. Methods. We present new near-infrared photometry of T2Cs in the bulge from the VISTA Variables in the Vía Láctea survey (VVV). We provide the largest sample (894 stars) of T2Cs with JHKs observations that have accurate periods from the Optical Gravitational Lensing Experiment (OGLE) catalog. Our analysis makes use of the Ks-band time-series observations to estimate mean magnitudes and individual distances by means of the PL relation. To constrain the kinematic properties of our targets, we complement our analysis with proper motions based on both the VVV and Gaia Data Release 2. Results. We derive an empirical Ks-band PL relation that depends on Galactic longitude and latitude: Ks0 = (10.66 ± 0.02) − (2.21 ± 0.03)·(log P−1.2)−(0.020±0.003)·l+(0.050±0.008)·|b| mag; individual extinction corrections are based on a 3D reddening map. Our targets display a centrally concentrated distribution, with solid evidence of ellipsoidal symmetry – similar to the RR Lyræ ellipsoid – and a few halo outliers up to ≳100 kpc. We obtain a distance from the Galactic center of R0 = 8.46 ± 0.03(stat.) ± 0.11(syst.) kpc. We also find evidence that the bulge T2Cs belong to a kinematically hot population, as the tangential velocity components (συl∗ = 104.2 ± 3.0kms−1 and συb = 96.8 ± 5.5kms−1) agree within 1.2σ. Moreover, the difference between absolute and relative proper motion is in good agreement with the proper motion of Sgr A✻ from VLBA measures. Conclusions. We conclude that bulge T2Cs display an ellipsoidal spatial distribution and have kinematics similar to RR Lyræ stars, which are other tracers of the old, low-mass stellar population. T2Cs also provide an estimate of R0 that agrees excellently well with the literature, taking account of the reddening law.
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Fitzpatrick, George E., and Kimberly A. Klock-Moore. "568 Challenges and Opportunities in Academic Advisement for Non-traditional Horticulture Students." HortScience 35, no. 3 (June 2000): 494A—494. http://dx.doi.org/10.21273/hortsci.35.3.494a.
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The average undergraduate horticulture major at the Univ. of Florida Academic Program at Fort Lauderdale is 38 years old. The older, non-traditional student population is quite diverse, but many individuals are motivated by a desire to change careers, and many of them have taken extensive academic course work at other institutions prior to applying for admission to the Univ. of Florida. Academic advisement of this type of student presents a substantial challenge because of the uncertainty of content and vigor of prior academic preparation. To help meet this challenge, we have developed several academic advisement checklists that indicate numbers and titles of critical preprofessional and general education courses from the academic institutions that have been most frequently attended by the highest numbers of the incoming non-traditional students. These checklists have been cross-referenced between the catalogs of the various academic institutions and the Univ. of Florida catalog. We use these documents to evaluate the academic preparation of incoming transfer students and to assist them in making correct course selections to remedy any academic deficiencies that could negatively influence their success in upper division horticulture course work.
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Fu, Sal Wanying, Daniel R. Weisz, Else Starkenburg, Nicolas Martin, Alessandro Savino, Michael Boylan-Kolchin, Patrick Côté, et al. "Metallicity Distribution Functions of 13 Ultra-faint Dwarf Galaxy Candidates from Hubble Space Telescope Narrowband Imaging." Astrophysical Journal 958, no. 2 (November 22, 2023): 167. http://dx.doi.org/10.3847/1538-4357/ad0030.
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Abstract We present uniformly measured stellar metallicities of 463 stars in 13 Milky Way (MW) ultra-faint dwarf galaxies (UFDs; M V = −7.1 to −0.8) using narrowband CaHK (F395N) imaging taken with the Hubble Space Telescope. This represents the largest homogeneous set of stellar metallicities in UFDs, increasing the number of metallicities in these 13 galaxies by a factor of 5 and doubling the number of metallicities in all known MW UFDs. We provide the first well-populated MDFs for all galaxies in this sample, with 〈[Fe/H]〉 ranging from −3.0 to −2.0 dex, and σ [Fe/H] ranging from 0.3–0.7 dex. We find a nearly constant [Fe/H]∼ −2.6 over 3 decades in luminosity (∼102–105 L ⊙), suggesting that the mass–metallicity relationship does not hold for such faint systems. We find a larger fraction (24%) of extremely metal-poor ([Fe/H]< −3) stars across our sample compared to the literature (14%), but note that uncertainties in our most metal-poor measurements make this an upper limit. We find 19% of stars in our UFD sample to be metal-rich ([Fe/H] > −2), consistent with the sum of literature spectroscopic studies. MW UFDs are known to be predominantly >13 Gyr old, meaning that all stars in our sample are truly ancient, unlike metal-poor stars in the MW, which have a range of possible ages. Our UFD metallicities are not well matched to known streams in the MW, providing further evidence that known MW substructures are not related to UFDs. We include a catalog of our stars to encourage community follow-up studies, including priority targets for ELT-era observations.
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Nakano, Davi. "Digital music, online outlets and their business models." Brazilian Journal of Operations & Production Management 16, no. 4 (November 30, 2019): 581–91. http://dx.doi.org/10.14488/bjopm.2019.v16.n4.a4.
Full textAbstract:
Goal: to describe the current configuration of digital music distribution, and to give an overview of the business practices adopted by digital music outlets.
Design/Methodology/Approach: Longitudinal study using descriptive statistics and cluster analysis on two datasets collected in 2011 and 2018.
Results: Three clusters were identified in 2011: paid download, music streaming, and video streaming. Data shows that, in 2018, although streaming was the predominant technical mode, many outlets still applied the paid download business model (BM), and that cluster presented the highest survival rate. Large outlets used streaming, but the specialized ones still adhered to download, and catalog specialization and consumer behavior are the explaining factors.
Limitations of the investigation: Data was gathered from 70 digital outlets operating in two major digital markets, USA and UK, but some large ones, such as Korea and Japan, were not analyzed.
Practical implications: While a dominant technology prevails on mass markets, old technologies can still be adopted in niche markets, due to market limitations and consumer behavior. Thus, even in concentrated markets, small competitors can benefit from exploring segments with special needs that are not addressed by large players.
Originality/Value: There are few quantitative studies and longitudinal analyses on digital music business models.
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Choi, Yumi, Knut A. G. Olsen, Gurtina Besla, Roeland P. van der Marel, Paul Zivick, Nitya Kallivayalil, and David L. Nidever. "The Recent LMC–SMC Collision: Timing and Impact Parameter Constraints from Comparison of Gaia LMC Disk Kinematics and N-body Simulations." Astrophysical Journal 927, no. 2 (March 1, 2022): 153. http://dx.doi.org/10.3847/1538-4357/ac4e90.
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Abstract We present analysis of the proper-motion (PM) field of the red clump stars in the Large Magellanic Cloud (LMC) disk using the Gaia Early Data Release 3 catalog. Using a kinematic model based on old stars with 3D velocity measurements, we construct the residual PM field by subtracting the center-of-mass motion and internal rotation motion components. The residual PM field reveals asymmetric patterns, including larger residual PMs in the southern disk. Comparisons of the observed residual PM field with those of five numerical simulations of an LMC analog that is subject to the tidal fields of the Milky Way and the Small Magellanic Cloud (SMC) show that the present-day LMC is not in dynamical equilibrium. We find that both the observed level of disk heating (PM residual rms of 0.057 ± 0.002 mas yr−1) and kinematic asymmetry are not reproduced by Milky Way tides or if the SMC impact parameter is larger than the size of the LMC disk. This measured level of disk heating provides a novel and important method to validate numerical simulations of the LMC–SMC interaction history. Our results alone put constraints on an impact parameter ≲10 kpc and impact timing <250 Myr. When adopting the impact timing constraint of ∼140–160 Myr ago from previous studies, our results suggest that the most recent SMC encounter must have occurred with an impact parameter of ∼5 kpc. We also find consistent radial trends in the kinematically and geometrically derived disk inclination and line-of-node position angles, indicating a common origin.