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Sökning: WFRF:(Hayes Christian R.) > (2020-2023) > The Lazy Giants :

The Lazy Giants : APOGEE Abundances Reveal Low Star Formation Efficiencies in the Magellanic Clouds

Nidever, David L. (författare)
Department of Physics, Montana State University, P.O. Box 173840, Bozeman, 59717-3840, MT, United States; NSF's National Optical-Infrared Astronomy Research Laboratory, 950 North Cherry Avenue, Tucson, 85719, AZ, United States
Hasselquist, Sten (författare)
Department of Physics and Astronomy, University of Utah, Salt Lake City, 84112, UT, United States
Hayes, Christian R. (författare)
Department of Astronomy, University of Virginia, Charlottesville, 22904, VA, United States
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Hawkins, Keith (författare)
Department of Astronomy, University of Texas at Austin, 2515 Speedway Boulevard, Austin, 78712, TX, United States
Povick, Joshua (författare)
Department of Physics, Montana State University, P.O. Box 173840, Bozeman, 59717-3840, MT, United States
Majewski, Steven R. (författare)
Department of Astronomy, University of Virginia, Charlottesville, 22904, VA, United States
Smith, Verne V. (författare)
NSF's National Optical-Infrared Astronomy Research Laboratory, 950 North Cherry Avenue, Tucson, 85719, AZ, United States
Anguiano, Borja (författare)
Department of Astronomy, University of Virginia, Charlottesville, 22904, VA, United States
Stringfellow, Guy S. (författare)
Center for Astrophysics and Space Astronomy, University of Colorado, 389 UCB, Boulder, 80309-0389, CO, United States
Sobeck, Jennifer S. (författare)
Department of Astronomy, University of Washington, 3910 15th Avenue NE, Seattle, 98195-0002, WA, United States
Cunha, Katia (författare)
Steward Observatory, University of Arizona, 933 North Cherry Street, Tucson, 85721, AZ, United States; Observatorio Nacional, Rio de Janeiro, Brazil
Beers, Timothy C. (författare)
Department of Physics, JINA, Center for the Evolution of the Elements, University of Notre Dame, Notre Dame, 46556, IN, United States
Bestenlehner, Joachim M. (författare)
Max-Planck-Institut für Astronomie, Königstuhl 17, Heidelberg, D-69117, Germany
Cohen, Roger E. (författare)
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, 21218, MD, United States
Garcia-Hernandez, D. A. (författare)
Instituto de Astrofísica de Canarias, La Laguna, Tenerife, E-38205, Spain; Universidad de la Laguna (ULL), Departamento de Astrofísica, La Laguna, Tenerife, E-38206, Spain,University of La Laguna (ULL)
Jönsson, Henrik (författare)
Malmö University,Lund University,Lunds universitet,Malmö universitet,Institutionen för materialvetenskap och tillämpad matematik (MTM),Lund Observatory, Department of Astronomy and Theoretical Physics, Lund University, Box 43, Lund, SE-22100, Sweden,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
Nitschelm, Christian (författare)
10 Centro de Astronomía (CITEVA), Universidad de Antofagasta, Avenida Angamos 601, Antofagasta, 1270300, Chile,University of Antofagasta
Shetrone, Matthew (författare)
McDonald Observatory, University of Texas at Austin, 1 University Station, Austin, 78712, TX, United States
Lacerna, Ivan (författare)
Instituto de Astronomía y Ciencias Planetarias, Universidad de Atacama, Copayapu, Copiapó, 485, Chile, Instituto Milenio de Astrofísica, Av. Vicu&ntilde,University of Atacama
Allende Prieto, Carlos (författare)
Instituto de Astrofísica de Canarias, La Laguna, Tenerife, E-38205, Spain; Universidad de la Laguna (ULL), Departamento de Astrofísica, La Laguna, Tenerife, E-38206, Spain,University of La Laguna (ULL)
Beaton, Rachael L. (författare)
Princeton Univ, Dept Astrophys Sci, 4 Ivy Lane, Princeton, NJ 08544 USA.;Carnegie Inst Washington Observ, 813 Santa Barbara St, Pasadena, CA 91101 USA.,Princeton University,Carnegie Observatories
Dell'Agli, Flavia (författare)
Instituto de Astrofísica de Canarias, La Laguna, Tenerife, E-38205, Spain; Universidad de la Laguna (ULL), Departamento de Astrofísica, La Laguna, Tenerife, E-38206, Spain,University of La Laguna (ULL)
Fernandez-Trincado, Jose G. (författare)
Instituto de Astronomía y Ciencias Planetarias, Universidad de Atacama, Copayapu, Copiapó, 485, Chile,University of Atacama
Feuillet, Diane (författare)
Max-Planck-Institut für Astronomie, Königstuhl 17, Heidelberg, D-69117, Germany
Gallart, Carme (författare)
Instituto de Astrofísica de Canarias, La Laguna, Tenerife, E-38205, Spain; Universidad de la Laguna (ULL), Departamento de Astrofísica, La Laguna, Tenerife, E-38206, Spain,University of La Laguna (ULL)
Hearty, Fred R. (författare)
Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, 16802, PA, United States
Holtzman, Jon (författare)
Department of Astronomy, New Mexico State University, Las Cruces, 88003, NM, United States
Manchado, Arturo (författare)
Instituto de Astrofísica de Canarias, La Laguna, Tenerife, E-38205, Spain; Universidad de la Laguna (ULL), Departamento de Astrofísica, La Laguna, Tenerife, E-38206, Spain; Consejo Superior de Investigaciones Científicas (CSIC), Madrid, E-28006, Spain,CSIC Spanish National Research Council,University of La Laguna (ULL)
Munoz, Ricardo R. (författare)
Departamento de Astronomía, Universidad de Chile, Camino del Observatorio 1515, Las Condes, Santiago, Chile, Visiting Astronomer, Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, Association of Universities for Research in Astronomy (AURA), National Science Foundation, Chile
O'Connell, Robert (författare)
Department of Astronomy, University of Virginia, Charlottesville, 22904, VA, United States
Rosado, Margarita (författare)
Instituto de Astronomía, Universidad Nacional Autonoma de Mexico (UNAM), Apdo. Postal 70-264, Mexico City, CP 04510, Mexico,National Autonomous University of Mexico
Muñoz, Ricardo R. (författare)
University of Chile
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Department of Physics, Montana State University, PO. Box 173840, Bozeman, 59717-3840, MT, United States; NSF's National Optical-Infrared Astronomy Research Laboratory, 950 North Cherry Avenue, Tucson, 85719, AZ, United States Department of Physics and Astronomy, University of Utah, Salt Lake City, 84112, UT, United States (creator_code:org_t)
2020-05-28
2020
Engelska.
Ingår i: Astrophysical Journal. - : Institute of Physics (IOP). - 0004-637X .- 1538-4357. ; 895:2
Relaterad länk:
https://iopscience.i...
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http://dx.doi.org/10... (free)
https://urn.kb.se/re...
https://doi.org/10.3...
https://lup.lub.lu.s...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • We report the first APOGEE metallicities and alpha-element abundances measured for 3600 red giant stars spanning a large radial range of both the Large (LMC) and Small Magellanic Clouds, the largest Milky Way (MW) dwarf galaxies. Our sample is an order of magnitude larger than that of previous studies and extends to much larger radial distances. These are the first results presented that make use of the newly installed southern APOGEE instrument on the du Pont telescope at Las Campanas Observatory. Our unbiased sample of the LMC spans a large range in metallicity, from [Fe/H] = -0.2 to very metal-poor stars with [Fe/H] -2.5, the most metal-poor Magellanic Cloud (MC) stars detected to date. The LMC [alpha/Fe]-[Fe/H] distribution is very flat over a large metallicity range but rises by similar to 0.1 dex at -1.0 < [Fe/H] less than or similar to -0.5. We interpret this as a sign of the known recent increase in MC star formation activity and are able to reproduce the pattern with a chemical evolution model that includes a recent "starburst." At the metal-poor end, we capture the increase of [alpha/Fe] with decreasing [Fe/H] and constrain the "alpha-knee" to [Fe/H] less than or similar to -2.2 in both MCs, implying a low star formation efficiency of similar to 0.01 Gyr(-1). The MC knees are more metal-poor than those of less massive MW dwarf galaxies such as Fornax, Sculptor, or Sagittarius. One possible interpretation is that the MCs formed in a lower-density environment than the MW, a hypothesis that is consistent with the paradigm that the MCs fell into the MW's gravitational potential only recently.

Ämnesord

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

Nyckelord

Magellanic Clouds
Galaxy abundances
Local Group
Surveys
Star formation

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