Log in

Relevant bibliographies by topics / Trapezium Cluster / Journal articles

Journal articles on the topic 'Trapezium Cluster'

To see the other types of publications on this topic, follow the link: Trapezium Cluster.

Author: Grafiati

Published: 10 December 2022

Last updated: 30 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Trapezium Cluster.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Allen, Christine, Alejandro Ruelas-Mayorga, Leonardo J. Sánchez, and Rafael Costero. "The formation of massive binaries as a result of the dynamical decay of trapezium systems." Proceedings of the International Astronomical Union 14, S346 (August 2018): 74–77. http://dx.doi.org/10.1017/s1743921318008074.

Full text

Abstract:

AbstractWe propose that a significant fraction of the wide massive binaries in the field are formed as a result of the disintegration of multiple systems of trapezium type. As examples we discuss here the binaries formed from the evolution of the mini-cluster associated with the B component of the Orion Trapezium, from that of the Orion Trapezium itself, and from 10 additional massive trapezia for which we found reliable data in the literature.

APA, Harvard, Vancouver, ISO, and other styles

2

Garay, Guido. "The Trapezium Radio Cluster of the Orion Nebula." International Astronomical Union Colloquium 120 (1989): 333–38. http://dx.doi.org/10.1017/s0252921100024040.

Full text

Abstract:

Abstract.We review the characteristics and discuss the nature of a dense group of compact radio sources found projected toward the Trapezium cluster of the Orion nebula. There are twenty-six radio sources, with flux densities greater than 2 mJy, clustered within a region of 35” radius around θ1C Orionis, the most luminous star of the Trapezium. The density of radio objects, of 1.4×104 pc-3, is extraordinarily high, about a thousand times greater than the density of stars in typical galactic clusters.

APA, Harvard, Vancouver, ISO, and other styles

3

Prosser, Charles F., John R. Stauffer, Lee Hartmann, David R. Soderblom, Burton F. Jones, Michael W. Werner, and Mark J. McCaughrean. "HST photometry of the trapezium cluster." Astrophysical Journal 421 (February 1994): 517. http://dx.doi.org/10.1086/173668.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

McCaughrean, Mark J. "Binarity in the Orion Trapezium Cluster." Symposium - International Astronomical Union 200 (2001): 169–80. http://dx.doi.org/10.1017/s0074180900225199.

Full text

Abstract:

We summarise the results of recent optical and near-infrared imaging studies of the binary fraction among young low-mass stars in the dense Orion Trapezium Cluster. Over the separation range ∼ 30–500 AU and within the observational errors, there appears to be no excess of binary systems in the cluster relative to the main sequence field star population. Over the separation range ∼ 1000–5000 AU, the cluster is deficient in binaries relative to the field. Both results are in contrast to those found for the more distributed population of young stars in the Taurus-Auriga dark clouds, which is overabundant in binaries by roughly a factor of two. We briefly discuss possible origins for this difference and observational tests which may distinguish between them, and the implications these results have for our understanding of the typical environment where most young stars are born.

APA, Harvard, Vancouver, ISO, and other styles

5

Otter, Justin, Adam Ginsburg, Nicholas P. Ballering, John Bally, J. A. Eisner, Ciriaco Goddi, Richard Plambeck, and Melvyn Wright. "Small Protoplanetary Disks in the Orion Nebula Cluster and OMC1 with ALMA." Astrophysical Journal 923, no. 2 (December 1, 2021): 221. http://dx.doi.org/10.3847/1538-4357/ac29c2.

Full text

Abstract:

Abstract The Orion Nebula Cluster (ONC) is the nearest dense star-forming region at ∼400 pc away, making it an ideal target to study the impact of high stellar density and proximity to massive stars (the Trapezium) on protoplanetary disk evolution. The OMC1 molecular cloud is a region of high extinction situated behind the Trapezium in which actively forming stars are shielded from the Trapezium’s strong radiation. In this work, we survey disks at high resolution with Atacama Large Millimeter/submillimeter Array at three wavelengths with resolutions of 0.″095 (3 mm; Band 3), 0.″048 (1.3 mm; Band 6), and 0.″030 (0.85 mm; Band 7) centered on radio Source I. We detect 127 sources, including 15 new sources that have not previously been detected at any wavelength. 72 sources are spatially resolved at 3 mm, with sizes from ∼8–100 au. We classify 76 infrared-detected sources as foreground ONC disks and the remainder as embedded OMC1 disks. The two samples have similar disk sizes, but the OMC1 sources have a dense and centrally concentrated spatial distribution, indicating they may constitute a spatially distinct subcluster. We find smaller disk sizes and a lack of large (>75 au) disks in both our samples compared to other nearby star-forming regions, indicating that environmental disk truncation processes are significant. While photoevaporation from nearby massive Trapezium stars may account for the smaller disks in the ONC, the embedded sources in OMC1 are hidden from this radiation and thus must truncated by some other mechanism, possibly dynamical truncation or accretion-driven contraction.

APA, Harvard, Vancouver, ISO, and other styles

6

Herbig, G. H., and D. M. Terndrup. "The Trapezium cluster of the Orion nebula." Astrophysical Journal 307 (August 1986): 609. http://dx.doi.org/10.1086/164447.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Simón-Díaz, Sergio, Artemio Herrero, and César Esteban. "A spectroscopic analysis of the Trapezium Cluster stars." Symposium - International Astronomical Union 212 (2003): 749–50. http://dx.doi.org/10.1017/s007418090021334x.

Full text

Abstract:

We consider the Orion Nebula (M 42) within a project aimed at studying the interaction between massive stars and their surrounding ISM. This is an H ii region ionized by θ1 Ori C, one of the four massive stars in the Trapezium Cluster. θ1 Ori C has the earliest spectral type (O7Vp) among them, emitting an ionizing flux several orders of magnitude larger than those of the other stars. We present a spectral analysis of the Trapezium Cluster stars to determine their stellar parameters. We use spectra between 4250 – 4750 Å and compare them with synthetic spectra obtained by means of an updated version of fastwind that includes an approximated treatment of metal-line blanketing.

APA, Harvard, Vancouver, ISO, and other styles

8

Simon, M., L. M. Close, and Tracy L. Beck. "Adaptive Optics Imaging of the Orion Trapezium Cluster." Astronomical Journal 117, no. 3 (March 1999): 1375–86. http://dx.doi.org/10.1086/300767.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Petr, Monika G., Vincent Coude du Foresto, Steven V. W. Beckwith, Andrea Richichi, and Mark J. McCaughrean. "Binary Stars in the Orion Trapezium Cluster Core." Astrophysical Journal 500, no. 2 (June 20, 1998): 825–37. http://dx.doi.org/10.1086/305751.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Lada, Charles J., August A. Muench, Elizabeth A. Lada, and João F. Alves. "Deep 3.8 Micron Observations of the Trapezium Cluster." Astronomical Journal 128, no. 3 (September 2004): 1254–64. http://dx.doi.org/10.1086/423294.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

KROUPA, P. "Binary stars in young clusters: models versus observations of the Trapezium Cluster." New Astronomy 4, no. 7 (December 1999): 495–519. http://dx.doi.org/10.1016/s1384-1076(99)00038-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

C. Riddick, Fiona, Patrick F. Roche, and Philip W. Lucas. "Optical Spectroscopy of Young Brown Dwarfs in Orion." Symposium - International Astronomical Union 211 (2003): 69–70. http://dx.doi.org/10.1017/s0074180900210280.

Full text

Abstract:

Red spectra of a sample of low-mass stars and brown dwarfs in the Orion Trapezium cluster are discussed. They show late-type spectral characteristics confirming cluster membership and some show evidence of circumstellar activity.

APA, Harvard, Vancouver, ISO, and other styles

13

Zinnecker, Hans. "On the Origin of the Orion Trapezium System." Proceedings of the International Astronomical Union 3, S246 (September 2007): 75–76. http://dx.doi.org/10.1017/s1743921308015354.

Full text

Abstract:

AbstractNumerical SPH simulations of supersonic gravo-turbulent fragmentation of a protocluster cloud (1000 M⊙) suggest that the cloud develops a few subclusters (star+gas systems) which subsequently merge into a single cluster entity. Each subcluster carries one most massive star (likely multiple), thus the merging of subclusters results in a central Trapezium-type system, as observed in the core of the Orion Nebula cluster.

APA, Harvard, Vancouver, ISO, and other styles

14

Poveda, Arcadio, Christine Allen, and Alejandro Hernández-Alcántara. "Low-Mass Runaway Stars from the Orion Trapezium Cluster." Astrophysical Journal 627, no. 1 (June 10, 2005): L61—L64. http://dx.doi.org/10.1086/432053.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Stauffer, John R., Charles F. Prosser, Lee Hartmann, and Mark J. McCaughrean. "Additional constraints on circumstellar disks in the Trapezium Cluster." Astronomical Journal 108 (October 1994): 1375. http://dx.doi.org/10.1086/117159.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Mandel, Gregory N., and William Herbst. "Rotation periods for seven stars in the Trapezium cluster." Astrophysical Journal 383 (December 1991): L75. http://dx.doi.org/10.1086/186245.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Vicente, S. M., and J. Alves. "Size distribution of circumstellar disks in the Trapezium cluster." Astronomy & Astrophysics 441, no. 1 (September 13, 2005): 195–205. http://dx.doi.org/10.1051/0004-6361:20053540.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Samuel, Angela E. "The Nature of Star Formation in the Trapezium Cluster." Publications of the Astronomical Society of Australia 10, no. 4 (1993): 367. http://dx.doi.org/10.1017/s1323358000027375.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Mann, Rita K., and Jonathan P. Williams. "MASSIVE PROTOPLANETARY DISKS IN ORION BEYOND THE TRAPEZIUM CLUSTER." Astrophysical Journal 699, no. 1 (June 15, 2009): L55—L58. http://dx.doi.org/10.1088/0004-637x/699/1/l55.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Bouy, H., J. Kolb, E. Marchetti, E. L. Martín, N. Huélamo, and D. Barrado y Navascués. "Multi-conjugate adaptive optics images of the Trapezium cluster." Astronomy & Astrophysics 477, no. 2 (October 23, 2007): 681–90. http://dx.doi.org/10.1051/0004-6361:20078599.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Vicente, Sílvia, João Alves, Isamu Matsuyama, Hervé Bouy, Loredana Spezzi, Joana Ascenso, Filipe D. Santos, and Timo Prusti. "VLT/NACO detection of a proplyd/jet candidate in the core of Trumpler 14." Proceedings of the International Astronomical Union 6, S275 (September 2010): 412–13. http://dx.doi.org/10.1017/s1743921310016534.

Full text

Abstract:

AbstractThis paper reports the discovery and presents the results of a first analysis of the observed morphology of a candidate external irradiated circumstellar disk/jet system found in the deep core of Trumpler 14, a cluster an order of magnitude more massive than the only cluster where bona-fide proplyds have been found, the Trapezium cluster in the Orion Nebula.

APA, Harvard, Vancouver, ISO, and other styles

22

Mermilliod, Jean-Claude, and Beatriz García. "Spectroscopic Binaries in Young Open Clusters." Symposium - International Astronomical Union 200 (2001): 191–98. http://dx.doi.org/10.1017/s0074180900225217.

Full text

Abstract:

We have analysed the binarity and multiplicity characteristics of 120 O-type stars in 22 very young open clusters and found marked differences between the “rich” (N ≥ 6 O-type stars and primaries) and “poor” (N = 1) clusters. In the rich clusters, the binary frequencies vary between 14% (1 SB among 7 stars) and 80% (8 SBs among 10 stars). Multiple systems seem not to be frequent and stars are spread all over the cluster area. In poor clusters, the binary frequency of the O-type objects is nearly 100%, with orbital periods around 3 days. Several binaries are also eclipsing. Additional companions are always present. They form either hierarchical multiple stars or trapezium systems. These massive multiple systems are generally found close to the cluster center, although there are exceptions.

APA, Harvard, Vancouver, ISO, and other styles

23

Umemoto, T., N. Ohashi, Y. Murata, K. Tatematsu, and M. Suzuki. "CS Lines and Dust Continuum Observations of the OMC2 Infrared Cluster." International Astronomical Union Colloquium 140 (1994): 245–46. http://dx.doi.org/10.1017/s025292110001962x.

Full text

Abstract:

It is known that stars in GMCs are often born as clusters. Recently, near infrared imaging has enabled us to study the young stars within molecular clouds (e.g., Lada & Lada 1991). Orion Molecular Cloud 2 (OMC2) is located 12' north of the Trapezium cluster in the Orion A cloud, and contains a cluster of about 20 near-IR sources and several FIR sources distributed within a diameter of 0.2 pc (Rayner et al... 1989; Johnson et al. 1990; Mezger, Wink, & Zylka 1990). By large scale mapping observations using the NRO 45 m telescope, this infrared cluster is found to be associated with a dense molecular core (Tatematsu et al. 1993, Umemoto et al. 1993). The region was observed using the Nobeyama Millimeter Array (NMA) to elucidate the structure and cluster formation process within a core.

APA, Harvard, Vancouver, ISO, and other styles

24

Fang, Min, Jinyoung Serena Kim, Ilaria Pascucci, and Dániel Apai. "An Improved Hertzsprung–Russell Diagram for the Orion Trapezium Cluster." Astrophysical Journal 908, no. 1 (February 1, 2021): 49. http://dx.doi.org/10.3847/1538-4357/abcec8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Mann, Rita K., and Jonathan P. Williams. "THE CIRCUMSTELLAR DISK MASS DISTRIBUTION IN THE ORION TRAPEZIUM CLUSTER." Astrophysical Journal 694, no. 1 (February 26, 2009): L36—L40. http://dx.doi.org/10.1088/0004-637x/694/1/l36.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Eaton, N. L., W. Herbst, and L. A. Hillenbrand. "Rotation Periods and Variability of Stars in the Trapezium Cluster." Astronomical Journal 110 (October 1995): 1735. http://dx.doi.org/10.1086/117646.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Petr-Gotzens, M. G., M. F. Sterzik, R. Köhler, J. Kolb, E. Marchetti, V. D. Ivanov, D. Nürnberger, et al. "Multi-conjugate adaptive optics observations of the Orion Trapezium Cluster." Journal of Physics: Conference Series 131 (October 1, 2008): 012026. http://dx.doi.org/10.1088/1742-6596/131/1/012026.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

McCaughrean, Mark. "Orion Proplyds and The Eagle's Eggs." Symposium - International Astronomical Union 182 (1997): 551–60. http://dx.doi.org/10.1017/s0074180900061945.

Full text

Abstract:

We describe the effects of environment on low-mass star formation, from the perspective that most stars in the galaxy form in dense clusters and aggregates in GMCs, often in the presence of massive OB stars. First, we discuss the observational evidence for circumstellar disks around stars of the Trapezium Cluster, and how they are affected by their environment. Second, we examine the more distant M 16, where photo-evaporation by OB stars may disrupt the star formation process, and may inhibit the development of circumstellar disks.

APA, Harvard, Vancouver, ISO, and other styles

29

A. Muench, August, Elizabeth A. Lada, Charles J. Lada, and João F. Alves. "The Substellar Luminosity and Mass Functions of the Trapezium Cluster Down to the Deuterium Burning Limit." Symposium - International Astronomical Union 211 (2003): 67–68. http://dx.doi.org/10.1017/s0074180900210279.

Full text

Abstract:

We have employed an advanced suite of Monte Carlo calculations to model the infrared luminosity function (KLF) of the Trapezium cluster and to derive its Sub-stellar Initial Mass Function down to the deuterium burning limit. Independent of the details, we find that sub-stellar objects can account for no more than ~ 22% of the total number of likely cluster members. This cluster's substellar IMF steadily declines in a power-law fashion over most of the brown dwarf regime, however the formation of a secondary peak in the cluster's substellar KLF suggests the existence of a corresponding secondary peak in the substellar IMF between 10 and 30 times the mass of Jupiter based upon the seemingly degenerate behavior of the theoretical substellar mass-luminosity relation.

APA, Harvard, Vancouver, ISO, and other styles

30

van Terwisga, S. E., A. Hacar, and E. F. van Dishoeck. "Disk masses in the Orion Molecular Cloud-2: distinguishing time and environment." Astronomy & Astrophysics 628 (August 2019): A85. http://dx.doi.org/10.1051/0004-6361/201935378.

Full text

Abstract:

Context. The mass evolution of protoplanetary disks is driven by internal processes and by external factors such as photoevaporation. Disentangling these two effects, however, remains difficult. Aims. We measured the dust masses of a sample of 132 disks in the Orion Molecular Cloud 2 (OMC-2) region, and compared them to externally photoevaporated disks in the Trapezium cluster, and to disks in nearby low-mass star-forming regions (SFRs). This allowed us to test whether initial disk properties are the same in high- and low-mass SFRs, and enabled a direct measurement of the effect of external photoevaporation on disks. Methods. A ~ 20′ × 4′ mosaic of 3 mm continuum observations from the Atacama Large Millimeter/submillimeter Array (ALMA) was used to measure the fluxes of 132 disks and 35 protostars >0.5 pc away from the Trapezium. We identify and characterize a sample of 34 point sources not included in the Spitzer catalog on which the sample is based. Results. Of the disks, 37 (28%) are detected, and have masses ranging from 7−270 M⊕. The detection rate for protostars is higher (69%). Disks near the Trapezium are found to be less massive by a factor 0.18−0.11+0.18, implying a mass loss rate of 8 × 10−8 M⊙ yr−1. Conclusions. Our observations allow us to distinguish the impact of time and environment on disk evolution in a single SFR. The disk mass distribution in OMC-2 is statistically indistinguishable from that in nearby low-mass SFRs like Lupus and Taurus. We conclude that age is the main factor that determines the evolution of these disks. This result is robust with respect to assumptions of dust temperature, sample incompleteness, and biases. The difference between the OMC-2 and Trapezium cluster samples is consistent with mass loss driven by far-ultraviolet radiation near the Trapezium. Taken together, this implies that in isolation disk formation and evolution proceed similarly, regardless of cloud mass.

APA, Harvard, Vancouver, ISO, and other styles

31

Caillault, Jean-Pierre, and Saied Zoonematkermani. "The EINSTEIN survey of the young stars in the Orion nebula." Symposium - International Astronomical Union 122 (1987): 119–20. http://dx.doi.org/10.1017/s0074180900156177.

Full text

Abstract:

We report here on the complete EINSTEIN survey of Orion within the central 2° x 2° region centered on the Trapezium. We present an X-ray mosaic of the Nebula and a complete X-ray catalog (200 sources) for this very young cluster. In addition, we discuss in detail variability, early-type stars, solar-type stars, and K-M stars.

APA, Harvard, Vancouver, ISO, and other styles

32

Simón-Díaz, S., A. Herrero, C. Esteban, and F. Najarro. "Detailed spectroscopic analysis of the Trapezium cluster stars inside the Orion nebula." Astronomy & Astrophysics 448, no. 1 (February 17, 2006): 351–66. http://dx.doi.org/10.1051/0004-6361:20053066.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Muench, August A., João Alves, Charles J. Lada, and Elizabeth A. Lada. "Evidence for Circumstellar Disks around Young Brown Dwarfs in the Trapezium Cluster." Astrophysical Journal 558, no. 1 (September 1, 2001): L51—L54. http://dx.doi.org/10.1086/323420.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Portegies Zwart, Simon F. "Stellar disc destruction by dynamical interactions in the Orion Trapezium star cluster." Monthly Notices of the Royal Astronomical Society 457, no. 1 (January 20, 2016): 313–19. http://dx.doi.org/10.1093/mnras/stv2831.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Meeus, G., and M. J. McCaughrean. "Using near-IR spectroscopy to classify substellar candidates in the Trapezium Cluster." Astronomische Nachrichten 326, no. 10 (December 2005): 977–80. http://dx.doi.org/10.1002/asna.200510448.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

F. Jameson, Richard, Paul D. Dobbie, David J. Pinfield, and Simon T. Hodgkin. "The Missing M Dwarfs." Symposium - International Astronomical Union 211 (2003): 171–74. http://dx.doi.org/10.1017/s0074180900210504.

Full text

Abstract:

We present evidence for a drop in the luminosity function around spectral type M7–M8. This shows in both field stars and the clusters σ–Orionis, the Trapezium, IC 348, IC 2391, α–Perseii, the Pleiades and, possibly, the globular cluster M4. This can be explained by a sudden drop in the luminosity-mass relation. Theoretical models, which include dust, do not show this effect, although they predict dust forming at about spectral type M7. We suggest that this drop in the luminosity-mass relation could be modelled by considering larger size dust grains. The drop in the luminosity-mass relation suggests that star/brown dwarf masses below M7–M8 will be larger than predicted by current models.

APA, Harvard, Vancouver, ISO, and other styles

37

Costero, Rafael, Christine Allen, Alex Ruelas-Mayorga, Leonardo Sánchez, Julio Ramírez Vélez, Juan Echevarría, and Gustavo C. Melgoza. "Échelle spectroscopy of the chemically peculiar star θ1 Ori F." Monthly Notices of the Royal Astronomical Society 507, no. 3 (August 27, 2021): 3400–3411. http://dx.doi.org/10.1093/mnras/stab2360.

Full text

Abstract:

ABSTRACT We analyse Échelle spectra of θ1 Ori F obtained by us on six nights unevenly distributed along 6 yr; we identify several hundred spectral lines and measure, for the first time, the star’s heliocentric radial velocity. We also collect and discuss previously published photometry of θ1 Ori F. We find that θ1 Ori F is a chemically peculiar (CP) star with overabundant silicon and phosphorus, and possibly other elements as well. From the singly ionized Fe, Cr and Ti lines we estimate its spectral type to be between B7 and B8. The radial velocity of θ1 Ori F is possibly marginally variable, with an average of 24 ± 4.2 km s−1 (standard deviation), in good agreement with the mean radial velocity of the Orion Nebula Cluster members, and about 5 km s−1 smaller than the average of the other Trapezium components. We cast doubt on the coeval nature of this star relative to the other Trapezium components, and present arguments that almost certainly exclude its membership to the Orion Trapezium. θ1 Ori F turns out to be enigmatic in several respects, and is probably an important link for understanding the evolutionary stage at which the CP phenomenon sets on.

APA, Harvard, Vancouver, ISO, and other styles

38

Mathieu, Robert D. "Stellar Kinematics in Star-Forming Regions." Symposium - International Astronomical Union 115 (1987): 61. http://dx.doi.org/10.1017/s0074180900094869.

Full text

Abstract:

High-precision radial-velocity studies of four star-forming regions: λ Orionis, NGC 2264, the Trapezium cluster and Taurus-Auriga, are completed or in process (in collaboration with Latham, Marschall and Hartmann). Single-order (∼ 50 Å, central wavelength 5200 Å) echelle spectra have been obtained for late-type pre-main sequence stars. Measurement errors of 0.7 – 1.5 km/sec are typical, although some stars do not permit any radial-velocity measurement due to stellar rotation or spectral peculiarities.

APA, Harvard, Vancouver, ISO, and other styles

39

Kumar, M. S. N., and S. Schmeja. "The spatial distribution of substellar objects in IC 348 and the Orion Trapezium cluster." Astronomy & Astrophysics 471, no. 2 (July 2, 2007): L33—L36. http://dx.doi.org/10.1051/0004-6361:20077875.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Briceño, César, Kevin L. Luhman, Lee Hartmann, John R. Stauffer, and J. Davy Kirkpatrick. "The Brown Dwarf Deficit in Taurus: Evidence for a Non-Universal IMF." Symposium - International Astronomical Union 211 (2003): 81–82. http://dx.doi.org/10.1017/s0074180900210322.

Full text

Abstract:

We present the results of a deep, optical/IR wide field imaging survey of selected fields in the nearby (d~ 140 pc) Taurus star-forming region. We report the discovery of 9 new members with spectral types M5.75–M9.5. We derive an Initial Mass Function encompassing 54% of the known members in Taurus. Comparison with dense regions like the Trapezium Cluster in Orion shows that Taurus has produced x2 less brown dwarfs. We suggest that the lower frequency of brown dwarfs in Taurus may result from the low-density star-forming environment, leading to larger minimum Jeans masses.

APA, Harvard, Vancouver, ISO, and other styles

41

Massey, R. M., and J. Meaburn. "Extensive, high-speed gas around the Trapezium cluster of the Orion nebula (M42, NGC 1976)." Monthly Notices of the Royal Astronomical Society 262, no. 1 (May 1993): L48—L50. http://dx.doi.org/10.1093/mnras/262.1.l48.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Schulz, Norbert S., David P. Huenemoerder, Moritz Günther, Paola Testa, and Claude R. Canizares. "X-RAY PROPERTIES OF LOW-MASS PRE-MAIN SEQUENCE STARS IN THE ORION TRAPEZIUM CLUSTER." Astrophysical Journal 810, no. 1 (August 28, 2015): 55. http://dx.doi.org/10.1088/0004-637x/810/1/55.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Close, L. M., K. Follette, J. R. Males, K. Morzinski, T. J. Rodigas, P. Hinz, Y.-L. Wu, et al. "Visible AO Observations at Halpha for Accreting Young Planets." Proceedings of the International Astronomical Union 8, S299 (June 2013): 32–33. http://dx.doi.org/10.1017/s1743921313007734.

Full text

Abstract:

AbstractWe utilized the new high-order (250-378 mode) Magellan Adaptive Optics system (MagAO) to obtain very high-resolution science in the visible with MagAO's VisAO CCD camera. In the good-median seeing conditions of Magellan (0.5–0.7″) we find MagAO delivers individual short exposure images as good as 19 mas optical resolution. Due to telescope vibrations, long exposure (60s) r' (0.63μm) images are slightly coarser at FWHM = 23-29 mas (Strehl ~ 28%) with bright (R < 9 mag) guide stars. These are the highest resolution filled-aperture images published to date. Images of the young (~ 1 Myr) Orion Trapezium θ1 Ori A, B, and C cluster members were obtained with VisAO. In particular, the 32 mas binary θ1 Ori C1C2 was easily resolved in non-interferometric images for the first time. Relative positions of the bright trapezium binary stars were measured with ~ 0.6–5 mas accuracy. In the second commissioning run we were able to correct 378 modes and achieved good contrasts (Strehl>20% on young transition disks at Hα). We discuss the contrasts achieved at Hα and the possibility of detecting low mass (~ 1–5 Mjup) planets (past 5AU) with our new SAPPHIRES survey with MagAO at Hα.

APA, Harvard, Vancouver, ISO, and other styles

44

Close, L. M., A. Puglisi, J. R. Males, C. Arcidiacono, A. Skemer, J. C. Guerra, L. Busoni, et al. "HIGH-RESOLUTION IMAGES OF ORBITAL MOTION IN THE ORION TRAPEZIUM CLUSTER WITH THE LBT AO SYSTEM." Astrophysical Journal 749, no. 2 (April 5, 2012): 180. http://dx.doi.org/10.1088/0004-637x/749/2/180.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

van Elteren, A., S. Portegies Zwart, I. Pelupessy, M. X. Cai, and S. L. W. McMillan. "Survivability of planetary systems in young and dense star clusters." Astronomy & Astrophysics 624 (April 2019): A120. http://dx.doi.org/10.1051/0004-6361/201834641.

Full text

Abstract:

Aims. We perform a simulation using the Astrophysical Multipurpose Software Environment of the Orion Trapezium star cluster in which the evolution of the stars and the dynamics of planetary systems are taken into account. Methods. The initial conditions from earlier simulations were selected in which the size and mass distributions of the observed circumstellar disks in this cluster are satisfactorily reproduced. Four, five, or size planets per star were introduced in orbit around the 500 solar-like stars with a maximum orbital separation of 400 au. Results. Our study focuses on the production of free-floating planets. A total of 357 become unbound from a total of 2522 planets in the initial conditions of the simulation. Of these, 281 leave the cluster within the crossing timescale of the star cluster; the others remain bound to the cluster as free-floating intra-cluster planets. Five of these free-floating intra-cluster planets are captured at a later time by another star. Conclusions. The two main mechanisms by which planets are lost from their host star, ejection upon a strong encounter with another star or internal planetary scattering, drive the evaporation independent of planet mass of orbital separation at birth. The effect of small perturbations due to slow changes in the cluster potential are important for the evolution of planetary systems. In addition, the probability of a star to lose a planet is independent of the planet mass and independent of its initial orbital separation. As a consequence, the mass distribution of free-floating planets is indistinguishable from the mass distribution of planets bound to their host star.

APA, Harvard, Vancouver, ISO, and other styles

46

Troland, T. H., W. M. Goss, C. L. Brogan, R. M. Crutcher, and D. A. Roberts. "ORION’S VEIL: MAGNETIC FIELD STRENGTHS AND OTHER PROPERTIES OF A PDR IN FRONT OF THE TRAPEZIUM CLUSTER." Astrophysical Journal 825, no. 1 (June 28, 2016): 2. http://dx.doi.org/10.3847/0004-637x/825/1/2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Muench, August A., Elizabeth A. Lada, Charles J. Lada, and Joao Alves. "The Luminosity and Mass Function of the Trapezium Cluster: From B Stars to the Deuterium‐burning Limit." Astrophysical Journal 573, no. 1 (July 2002): 366–93. http://dx.doi.org/10.1086/340554.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

O'Dell, C. R. "Herbig-Haro Objects in the Orion Nebula Region." Symposium - International Astronomical Union 182 (1997): 39–46. http://dx.doi.org/10.1017/s0074180900061520.

Full text

Abstract:

The Orion Nebula Region has two different systems of objects classified as HH objects. The North System is associated with the H2 fingers seen in the infrared and is probably the result of Rayleigh-Taylor instabilities in shocked material moving into the near side of the giant molecular cloud OMC-1. The South System is associated with source(s) within the Trapezium cluster, with the shocked HH objects occuring where jets from pre-main sequence stars impinge on the neutral lid of material that lies across the front of the Orion Nebula. Such jets are different from those driving other HH objects in that these are passing through photoionized material and two of the Orion jets may have been detected.

APA, Harvard, Vancouver, ISO, and other styles

49

Lada, Charles J., August A. Muench, Karl E. Haisch, Jr., Elizabeth A. Lada, João F. Alves, Eric V. Tollestrup, and S. P. Willner. "Infrared [ITAL]L[/ITAL]-Band Observations of the Trapezium Cluster: A Census of Circumstellar Disks and Candidate Protostars." Astronomical Journal 120, no. 6 (December 2000): 3162–76. http://dx.doi.org/10.1086/316848.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Robberto, M., J. Song, G. Mora Carrillo, S. V. W. Beckwith, R. B. Makidon, and N. Panagia. "Hubble Space TelescopeWFPC2 Study of the Trapezium Cluster: The Influence of Circumstellar Disks on the Initial Mass Function." Astrophysical Journal 606, no. 2 (May 10, 2004): 952–68. http://dx.doi.org/10.1086/383141.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!