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The Similarity of A...
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Griffith, EmilyThe Department of Astronomy and Center of Cosmology and AstroParticle Physics, The Ohio State University, Columbus, OH 43210, USA
(author)
The Similarity of Abundance Ratio Trends and Nucleosynthetic Patterns in the Milky Way Disk and Bulge
- Article/chapterEnglish2021
Publisher, publication year, extent ...
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2021-03-08
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Institute of Physics Publishing (IOPP),2021
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electronicrdacarrier
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LIBRIS-ID:oai:DiVA.org:mau-41577
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https://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-41577URI
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https://doi.org/10.3847/1538-4357/abd6beDOI
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https://lup.lub.lu.se/record/3808dfe5-1a6a-4976-9551-8203e5bf6161URI
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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We compare abundance ratio trends in a sample of similar to 11,000 Milky Way bulge stars (R-GC < 3 kpc) from the Apache Point Observatory Galactic Evolution Experiment (APOGEE) to those of APOGEE stars in the Galactic disk (5 kpc < R-GC < 11 kpc). We divide each sample into low-Ia (high-[Mg/Fe]) and high-Ia (low-[Mg/Fe]) populations, and in each population, we examine the median trends of [X/Mg] versus [Mg/H] for elements X = Fe, O, Na, Al, Si, P, S, K, Ca, V, Cr, Mn, Co, Ni, Cu, and Ce. To remove small systematic trends of APOGEE abundances with stellar log(g), we resample the disk stars to match the log(g) distributions of the bulge data. After doing so, we find nearly identical median trends for low-Ia disk and bulge stars for all elements. High-Ia trends are similar for most elements, with noticeable (0.05-0.1 dex) differences for Mn, Na, and Co. The close agreement of abundance trends (with typical differences less than or similar to 0.03 dex) implies that similar nucleosynthetic processes enriched bulge and disk stars despite the different star formation histories and physical conditions of these regions. For example, we infer that differences in the high-mass slope of the stellar initial mass function between disk and bulge must have been less than or similar to 0.30. This agreement, and the generally small scatter about the median sequences, means that one can predict all of a bulge star's APOGEE abundances with good accuracy knowing only its measured [Mg/Fe] and [Mg/H] and the observed trends of disk stars.
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Weinberg, David H.The Department of Astronomy and Center of Cosmology and AstroParticle Physics, The Ohio State University, Columbus, OH 43210, USA
(author)
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Johnson, Jennifer A.The Department of Astronomy and Center of Cosmology and AstroParticle Physics, The Ohio State University, Columbus, OH 43210, USA(Swepub:lu)je1014jo
(author)
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Beaton, RachaelThe Carnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101, USA
(author)
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Garcia-Hernandez, D. A.Instituto de Astrofísica de Canarias (IAC), E-38205 La Laguna, Tenerife, Spain; Universidad de La Laguna (ULL), Departamento de Astrofísica, E-38206 La Laguna, Tenerife, Spain,University of La Laguna (ULL)
(author)
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Hasselquist, StenDepartment of Physics & Astronomy, University of Utah, Salt Lake City, UT 84112, USA
(author)
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Holtzman, JonDepartment of Astronomy, New Mexico State University, Las Cruces, NM 88003, USA(Swepub:lu)jo6205ho
(author)
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Johnson, James W.The Department of Astronomy and Center of Cosmology and AstroParticle Physics, The Ohio State University, Columbus, OH 43210, USA
(author)
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Jönsson, HenrikMalmö 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, SE-22100 Lund, 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(Swepub:lu)astr-hkj
(author)
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Lane, Richard R.Instituto de Astronomía y Ciencias Planetarias de Atacama, Universidad de Atacama, Copayapu 485, Copiapó, Chile,University of Atacama
(author)
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Nataf, David M.Center for Astrophysical Sciences and Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218, USA
(author)
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Roman-Lopes, AlexandreDepartamento de Astronomía, Universidad de La Serena—Av. Juan Cisternas, 1200 North, La Serena, Chile
(author)
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The Department of Astronomy and Center of Cosmology and AstroParticle Physics, The Ohio State University, Columbus, OH 43210, USAThe Carnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101, USA
(creator_code:org_t)
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In:Astrophysical Journal: Institute of Physics Publishing (IOPP)909:10004-637X1538-4357
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