Bibliographies thématiques / NGC 1365

Littérature scientifique sur le sujet « NGC 1365 »

Auteur : Grafiati

Publié le 10 mars 2023

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Articles de revues sur le sujet "NGC 1365"

Lindblad, Per Olof. « NGC 1365 ». Astronomy and Astrophysics Review 9, n^o 3-4 (1 septembre 1999) : 221–71. http://dx.doi.org/10.1007/s001590050018.

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Jörsäter, S., et G. A. van Moorsel. « The HI in the Large Barred Spiral NGC 1365 ». International Astronomical Union Colloquium 157 (1996) : 168–71. http://dx.doi.org/10.1017/s025292110004968x.

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AbstractWe have made high resolution HI observations using the VLA1 of the barred spiral galaxy NGC 1365. This galaxy contains 15.2 × 109M⊙ of HI. The velocity field is strongly affected by the bar only in the inner parts. NGC 1365 has a warp and it has 4 well developed spiral arms and 2 rudimentary ones. NGC 1365 has an unusually dropping rotation curve.

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Phillips, Andrew C., et Peter S. Conti. « Detection of WC9 stars in NGC 1365 ». Astrophysical Journal 395 (août 1992) : L91. http://dx.doi.org/10.1086/186495.

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Galliano, E., D. Alloin, E. Pantin, G. L. Granato, P. Delva, L. Silva, P. O. Lagage et P. Panuzzo. « Extremely massive young clusters in NGC 1365 ». Astronomy & ; Astrophysics 492, n^o 1 (11 septembre 2008) : 3–22. http://dx.doi.org/10.1051/0004-6361:20077621.

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Lindblad, P. A. B., P. O. Lindblad et E. Athanassoula. « Hydrodynamical Simulations of the Barred Spiral Galaxy NGC 1365 ». International Astronomical Union Colloquium 157 (1996) : 413–15. http://dx.doi.org/10.1017/s0252921100050119.

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Several authors have explored the field of gas dynamics in barred systems. One of the aims of these investigations was to compare the model gaseous response, due to some assumed underlying stellar gravitational field, with observed gas density distribution and kinematics of barred galaxies. The gas is known to respond in a highly non-linear way, and therefore should give clues to dynamical parameters like the mass distribution, positions and existence of principal resonances and thereby the pattern speed.High resolution HI data now exist for NGC 1365 (Jörsäter & van Moorsel 1995), and the kinematical HI data have been combined with optical long slit measurements to obtain the velocity field (Lindblad et al. 1995) used for extracting the rotation curve, representing the axisymmetric forces in NGC 1365, and for comparisons with models. A mosaic image of NGC 1365 in the J-band was used to compute the perturbing potential used in the models.

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Wang, Junfeng, G. Fabbiano, M. Elvis, G. Risaliti, J. M. Mazzarella, J. H. Howell et S. Lord. « IMAGING THE CIRCUMNUCLEAR REGION OF NGC 1365 WITHCHANDRA ». Astrophysical Journal 694, n^o 2 (19 mars 2009) : 718–33. http://dx.doi.org/10.1088/0004-637x/694/2/718.

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Hjelm, M., P. O. Lindblad et S. Jörsäter. « Nuclear Activity in the Seyfert Galaxy NGC 1365 ». Symposium - International Astronomical Union 159 (1994) : 448. http://dx.doi.org/10.1017/s0074180900176296.

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NGC 1365 is a barred Seyfert 1.5 galaxy. Fig 1a is a contour plot of an [OIII]λ5007 image (Jörsäter & Lindblad 1989), showing a plume-like structure pointing towards SE in the direction of the minor axis of the galaxy, which also is the direction of the steepest velocity gradient in [OIII]λ5007. The plume is roughly aligned with a radio feature in the 6 and 20 cm continuum (see Sandqvist et al., this volume). The [OIII]-emission on the NW side is weaker. This plume-like structure is not seen in Hα.

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Tabatabaei, F. S., A. Weiß, F. Combes, C. Henkel, K. M. Menten, R. Beck, A. Kovács et R. Güsten. « Cold dust in the giant barred galaxy NGC 1365 ». Astronomy & ; Astrophysics 555 (juillet 2013) : A128. http://dx.doi.org/10.1051/0004-6361/201321487.

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Speights, Jason C., et David J. Westpfahl. « THE SHEARING H I SPIRAL PATTERN OF NGC 1365 ». Astrophysical Journal 736, n^o 1 (6 juillet 2011) : 70. http://dx.doi.org/10.1088/0004-637x/736/1/70.

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Galliano, Emmanuel, et Danielle Alloin. « Gas trapping in extremely massive clusters in NGC 1365 ». Proceedings of the International Astronomical Union 5, S266 (août 2009) : 399. http://dx.doi.org/10.1017/s1743921309991475.

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AbstractThree radio cm sources in the central star-forming kpc of the closeby barred Seyfert galaxy NGC 1365 are observed. The complete dataset includes VLT infrared J, K, L and N images and spectra. The main observed features include (i) a rising dust continuum towards the mid-infrared (MIR), (ii) bright H emission lines and PAH (polycyclic aromatic hydrocarbon) features, (iii) a bright MIR [Neii] line, and (iv) no detection of MIR [Siv] or [Ariii] lines. For a typical cluster star-formation history and initial mass function, the [Ariii]/[Neii] and [Siv]/[Neii] ratios exhibit an abrupt decrease of several orders of magnitude at an age of ~ 7 Myr. The nondetection of [Ariii] and [Siv] indicates that the clusters are of approximately this age.

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Thèses sur le sujet "NGC 1365"

Shelton, Jarod Ross. « CHARACTERIZING THE ROLE OF THE TRANSCRIPTION FACTORS, αNAC, BTF3 AND SKNAC, IN MYOGENESIS ». OpenSIUC, 2013. https://opensiuc.lib.siu.edu/theses/1325.

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Myogenesis is a complex and tightly regulated process, the end result of which is the formation of multinucleated myofibers. Muscle formation requires the precise expression of multiple myogenic regulatory factors (MRFs), whose expression regulates transcription of muscle specific proteins. Alteration in the expression of a muscle specific gene or protein ultimately results in muscle dysfunction. The inappropriate expression of factors that control muscle development may also be a contributing factor in Rhabdomyosarcoma, a pediatric cancer that accounts for most soft tissue sarcomas that arise in children. Previous studies suggest that the regulation of αNAC, BTF3, and skNAC are vital for normal myogenesis. Alterations in these factors results in retarded development and severe disorganization of muscle tissue. We hypothesized that αNAC, BTF3, and skNAC are imperative transcription factors whose dysregulation significantly alters the kinetics of C2C12 cell (murine skeletal muscle cells) myogenesis. We have shown that erroneous expression of these transcription factors is detrimental to myogenesis. In addition, we have shown that these transcription factors are recruited to muscle specific gene promoters during the myogenic differentiation program and the expression of αNAC, BTF3, and skNAC may potentiate the expression of the MRFs. Together, our experiments suggest that the expression of αNAC, BTF3, and skNAC are essential for the normal progression of myogenesis.

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Venturi, Giacomo. « The impact of galactic outflows on their host galaxies through spatially resolved spectroscopy ». Doctoral thesis, 2019. http://hdl.handle.net/2158/1160629.

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The observed properties of galaxies and supermassive black holes (BH) at their centers suggest that there must be a non-gravitational feedback mechanism regulating their evolution. These are the discrepancy at low and high masses between the observed stellar mass function of galaxies and that predicted by ΛCDM models, the scaling relations between the mass of BHs and the velocity dispersion, mass and luminosity of the host galaxy spheroid and the similarity between BH growth and star formation cosmic histories. Models of galaxy formation and evolution in fact routinely include feedback from active galactic nuclei (AGN) and supernovae (SNe), which can successfully reproduce the observed properties cited above. Models consider the following two types of AGN feedback: the radiative mode (or quasar mode), that operates during a luminous AGN phase through winds powered by radiation pressure, and the kinetic (or radio) mode, in which kinetic energy is released by the AGN on longer timescales through relativistic jets, which heat the surrounding halo in galaxy clusters, thus preventing cooling and further accretion on the central galaxy, and consequently further star formation. So far, the clearest observational evidence of AGN feedback comes from the kinetic mode in massive central cluster galaxies. Radiative feedback is instead more elusive, and has been recently revealed in action only in a few luminous quasars around the peak of AGN activity history (z~2), where most powerful outflows are observed. However, it is not possible to study high-z quasar outflows on small spatial scales (<100 pc), being poorly-resolved or even unresolved in observations, due to their large distances. This can lead to systematics and uncertainties in the determination of outflow properties and forces to make some assumptions on them, which further increases the uncertainties on the outflow energetics and complicates the evaluation of the impact of outflows on host galaxies and the comparison with models. On the contrary, due to their vicinity, nearby active galaxies are ideal laboratories to explore in detail outflow properties, their formation and acceleration mechanisms, as well as the effects of AGN activity on host galaxies. This work focuses on investigating the properties of outflows in nearby Seyfert galaxies, the physical conditions of the ionized gas and the interplay between nuclear activity and star formation in the galaxy, thanks to the unprecedented combination of spatial and spectral coverage provided by the integral field spectrograph MUSE at the Very Large Telescope (VLT). We introduce our optically- and X-ray selected sample of nearby Seyferts, called MAGNUM survey. We present our MUSE emission-line flux and kinematic maps of the 10 objects we have analyzed so far, including a star-forming galaxy, NGC 6810, to study the properties of a starburst outflow for comparison as well. We map the ionized gas down to spatial scales as low as ~10 pc. We find ubiquitous ionization cones and outflows with various morphologies and extensions, from a few hundred pc to several kpc. We detect peculiar kinematic features suggestive of outflows with hollow-conical structures. We also identify enhanced linewidths perpendicular to radio jets, which point to a correlation between the presence of jets and perpendicular turbulent or outflowing gas motions. We then focus on a detailed multi-wavelength study of the ionized gas and outflow, in terms of physical properties, kinematics, and ionization mechanisms, in one specific galaxy of our sample, NGC 1365, from MUSE in optical band and Chandra satellite in X-rays. Here we map a kpc-scale biconical outflow ionized by the AGN prominent in [O III], while Hα emission traces star formation in a circumnuclear ring and along the bar of the galaxy. Soft X-rays are mostly due to thermal emission from the star-forming regions, but we manage to isolate the AGN photoionized component which matches the [O III] emission from MUSE. We map the mass outflow rate of the galactic ionized outflow, which matches that of the nuclear X-ray wind and then decreases with radius. The integrated mass outflow rate, kinetic energy rate, and outflow velocity are broadly consistent with the typical relations observed in more luminous AGN. We extend our analysis to the nearby star-forming galaxy NGC 6810, whose bipolar galactic ionized outflow we map with MUSE. We determine the dominant ionization mechanism in the outflow, its density and ionization parameter, discovering the first case of star formation occurring within an outflow in an unambiguously star-forming galaxy. We finally investigate with MUSE also the kinetic AGN feedback, by studying the ionized gas enshrouding the X-ray cavity inflated by radio jets around the massive radio-galaxy 3C 317 at the center of the local cluster Abell 2052. Thanks to MUSE capabilities, by mapping the warm gas filaments enshrouding the bubble we are able to directly measure the expansion velocity of the cavity, which usually is instead assumed or derived from indirect and model-dependent methods.

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Chutter, Ashley. « Elemental abundance investigation of two candidate extragalactic globular clusters (NGC 5024, NGC 5466) ». Thesis, 2008. http://hdl.handle.net/1828/1355.

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High resolution spectra have been analyzed for two and three stars respectively in the candidate extragalactic globular clusters, NGC 5024 and NGC 5466, with the High-Resolution Spectrograph on the 9.2 m Hobby-Eberly Telescope. The goal of this investigation is to evaluate the proposed extragalactic origins of these two globular clusters. Evidence of a tidal tail in NGC 5466 (Belokurov et al., 2006) and the association of NGC 5024 with the Sagittarius stream (Martinez-Delgado et al., 2004) targeted the clusters as likely remnants of recent accretion events and thus potentially of extragalactic origin. Determination of their chemical abundance patterns could provide unique evidence to either support or dispute these claims. NGC 5024 has been associated with a proposed wrap in the Sagittarius stream which could be supported if the chemistry of NGC 5024 is similar to other clusters associated with the stream. NGC 5466 has the longest tidal tail known, which hints at an origin in a now dispersed dwarf spheroidal galaxy. Additional evidence for these clusters' capture origins has been compiled by Yoon & Lee (2002), demonstrating that these two low metallicity clusters, along with five others, are aligned in a single highly inclined plane in the outer halo. Confirmation that these clusters are remnants of dwarf galaxies would support a Galactic history which includes recent accretion events. Such evidence may bolster the cold dark matter hierarchical clustering scenario, which postulates the presence of a significant amount of substructure in the Milky Way. Unfortunately, at the metallicity of the target clusters ([Fe/H] = -1.9), the chemical distinction between Galactic stars and known dSph stars is not significant. The low [alpha/Fe] of dSph stars seen at higher metallicity is not apparent at [Fe/H] = -1.9 in either Galactic or dSph stars. Aside from a few mild discrepancies, NGC 5024 and NGC 5466 appear chemically similar to the Galactic field stars and globular clusters compiled by Pritzl et al. (2005). A moderate enhancement in the [Ba/Y] ratios relative to the halo field stars is the only positively detected chemical signature that is typically observed in dSph stars. Comparisons with Galactic GCs of similar age, metallicity and horizontal branch morphology (NGC 2298, NGC 6397 and NGC 5897) reveal a few other differences, but these could be attributed to systematic effects in the different analysis techniques. Although NGC 5024 has a similar metallicity to the GC Arp 2 that was stripped from the merging Sagittarius dwarf, neither Arp 2 (Mottini et al., 2008) nor the clusters in this study show any particularly unusual chemical abundance patterns. Thus, no conclusive evidence in support of or in opposition to the target clusters' proposed extragalactic origins has been discovered.

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Livres sur le sujet "NGC 1365"

Patton, Charlotte Graves. Security Council Resolution 1325. Oxford University Press, 2017. http://dx.doi.org/10.1093/acrefore/9780190846626.013.295.

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Resolution 1325, adopted by the United Nations Security Council (SC) on October 31, 2000, reaffirms the important role of women in conflict resolution as well as in the maintenance and promotion of international peace and security. Res 1325 urges states to expand the number of women working in UN peacekeeping, diplomacy, the military, and police, while rejecting impunity in matters of genocide, war crimes, crimes against humanity, especially with reference to violence against women. It also calls for greater consideration of the needs of women and girls in conflict circumstances, including in refugee camps, and the different needs of female and male ex-combatants in disarmament, demobilization, and reintegration (DDR). Transnational networks, such as the NGO Working Group on Women, Peace, and Security (NGOWGWPS), played an influential role in the drafting of Res 1325y. The implementation of this resolution throughout UN agencies may be assessed using two theoretical perspectives, constructivism and neorealism. The NGOWGWPS’s published report, Five Years On Report: From Local to Global: Making Peace Work for Women, describes National Action Plans (NAPs) as a tool that member states could use to detail steps that they will take to fulfill Res 1325’s objectives. It is worth noting that 37 out of 193 member countries of the UN have or are establishing NAPs. However, the UN has been slow to “adopt, consume, and promote” the norms embodied in SC Res 1325. One way to address this is to include changes in national foreign policies actively supporting such norms.

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Chapitres de livres sur le sujet "NGC 1365"

Jörsäter, Steven. « The velocity field of NGC 1365 ». Dans New Aspects of Galaxy Photometry, 287–88. Berlin, Heidelberg : Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/bfb0030960.

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Hjelm, M., P. O. Lindblad et S. Jörsäter. « Nuclear Activity in the Seyfert Galaxy NGC 1365 ». Dans Multi-Wavelength Continuum Emission of AGN, 448. Dordrecht : Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-010-9537-2_154.

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Brenneman, Laura. « Epilogue : NuSTAR Validates Inner Disk Reflection in NGC 1365 ». Dans SpringerBriefs in Astronomy, 47–49. New York, NY : Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-7771-6_7.

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Per Lindblad, Olof, Maja Hjelm, Steven Jörsäter et Helmuth Kristen. « The nuclear high excitation outflow cone in NGC 1365 ». Dans Barred Galaxies and Circumnuclear Activity, 283–91. Berlin, Heidelberg : Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/bfb0101985.

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Sandqvist, A. A., S. Jörsäter et P. O. Lindblad. « The Central Region of NGC 1365. SEST and VLA Observations of CO and the Radio Continuum ». Dans Multi-Wavelength Continuum Emission of AGN, 431. Dordrecht : Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-010-9537-2_141.

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Actes de conférences sur le sujet "NGC 1365"

Wang, Junfeng, G. Fabbiano, M. Elvis, G. Risaliti, M. Karovska, A. Zezas, J. M. Mazzarella et al. « Chandra High Resolution Imaging of NGC 1365 and NGC 4151 ». Dans X-RAY ASTRONOMY 2009 ; PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES : Proceedings of the International Conference. AIP, 2010. http://dx.doi.org/10.1063/1.3475330.

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Brenneman, Laura W., Guido Risaliti et Martin Elvis. « Suzaku's view of inner disk eclipses in NGC 1365 ». Dans SUZAKU 2011 : Exploring the X-ray Universe : Suzaku and Beyond. AIP, 2012. http://dx.doi.org/10.1063/1.3696172.

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Konigshofer, Yves, Bharathi Anekella et Russell Garlick. « Abstract 1385 : Patient-derived xenografts as validation material for NGS assays : Analysis of genetic homogeneity ». Dans Proceedings : AACR 107th Annual Meeting 2016 ; April 16-20, 2016 ; New Orleans, LA. American Association for Cancer Research, 2016. http://dx.doi.org/10.1158/1538-7445.am2016-1385.

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Marchelli, Grant L. S., David R. Haynor, William R. Ledoux, Mark A. Ganter et Duane W. Storti. « Graphical User Interface for Human Intervention in 2D-3D Registration of Medical Images ». Dans ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-13659.

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Image-guided medical therapies and image-guided biomechanical measurement systems often combine 2D and 3D imaging modalities. Determination of relations between the 2D and 3D imaging data is known as 2D-3D registration. Motivated by an ongoing project aimed at non-invasive, marker-free measurement of the kinematics of the bones in the foot during gait, we consider a registration approach that involves (1) computing projections of the 3D data set, (2) computing a quality measure to describe the agreement/discrepancy between the simulated projections and actual 2D images, and (3) optimization of the quality measure relative to the kinematic degrees of freedom to determine the optimal registration. For our particular project, the 3D imaging modality is CT scan, the 2D modality is bi-plane fluoroscopy, the computed projection is a digitally reconstructed radiograph (DRR), the quality measure is normalized cross-correlation (NCC) between a pair of DRRs and a pair of corresponding fluoroscope images, and the 2D imaging includes a sequence of several hundred stereo image pairs. We have recently released a software toolkit, DRRACC, that accelerates both the DRR and NCC computations via GPU-based parallel processing to enable more efficient automated determination of kinematic relations for optimal registration. While fully automated 2D-3D registration is desirable, there are situations (such as creating a reasonable starting configuration for optimization, re-starting after the optimizer fails to converge, and visual verification of registration relations) when it is desirable/necessary to have a human in the loop. In this paper, we present an OpenGL-based graphical user interface that employs the DRRACC toolkit to allow the user to manipulate the kinematics of individual objects (bones) segmented from the 3D imaging and to view the corresponding DRR and the associated correlation with a reference image in real time. We also present plots showing initial results for the dependence of the registration measure on pairs of kinematic parameters. The plots show well-defined peaks that support the hope for automated registration, but they also contain large relatively flat regions that may prove problematic for gradient-based optimizers and necessitate the sort of interface presented in this paper.

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Kuo, Winston Patrick, Amy Wang, Tak Cheng, Pan Du et Shidong Jia. « Abstract 1395 : Development and validation of NGS-based clinical cancer panels for precision medicine in Asian and Caucasian adult cancers ». Dans Proceedings : AACR 107th Annual Meeting 2016 ; April 16-20, 2016 ; New Orleans, LA. American Association for Cancer Research, 2016. http://dx.doi.org/10.1158/1538-7445.am2016-1395.

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Oviedo, Karin, et John Erick Malpartida Moya. « Field Data Collection Using GIS Technology for the Management of Geohazards and Third-Party Damage Threats in the Pipeline Transportation System of Natural Gas (NG) and Natural Gas Liquids (NGL) ». Dans ASME-ARPEL 2019 International Pipeline Geotechnical Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ipg2019-5304.

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Abstract The Camisea Pipelines Transportation System (STD) owned by Transportadora de Gas del Peru (TGP) is operated and maintained by Compania Operadora de Gas del Amazonas (COGA). The system consists of two pipelines: a 730-kilometer long Natural Gas (NG) pipeline, which runs from the Upstream facilities in the Malvinas to the Receptor Station in Lurin (south of Lima), which has a loop in the area of Coast of 135 km in length and the Natural Gas Liquids pipeline (NGL) of 557 kilometers, which transports the condensed liquids from Malvinas to Pisco, on the coast of Peru. In the first 210 km, it crosses a complicated zone of the Peruvian Amazon, between the kilometric poste (KP) 210 and KP 420, the sector of the mountain range is defined and between the KP 420 and KP 730, the coastal sector is located. Due to the influence area and the project magnitude, solutions for many problems frequently require access to various types of information that can only be geographically related or by their spatial distribution. In this sense the Geographic Information Systems (GIS), provides the necessary tools to store and manage information using these references, thus allowing to analyze patterns of behavior, relationships and trends in information, all with the interest of contributing to the taking of better decisions. Likewise, given the complicated geography on which the project is developed, as well as the populations dynamic, the threats of geohazards and damages by third parties respectively, require evaluations and field data collection on a permanent basis, this also because it is about threats that are independent of time and that represent the highest percentage of failures for the South American pipelines. In this sense, data collection using GIS technology allows users, through the use of previously established forms, to capture field information, as well as the corresponding photographic record. Also, during the data collection, users have at their disposal on their mobile devices relevant information that allows a more objective spatial and temporal analysis of a specific place. This information is synchronized with the GIS database of the organization and used in the evaluation of risks to the integrity of the pipelines. This article describes the methodology for field data collection, using GIS technology, as well as the process of validation and publication of the data in the Geodatabase of the company and the benefits associated with having updated and available information to guarantee the best decision making.

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