Chemical Cartography with APOGEE: Multi-element Abundance Ratios

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dc.contributor.authorWeinberg, David H.
dc.contributor.authorHoltzman, Jon A.
dc.contributor.authorHasselquist, Sten
dc.contributor.authorBird, Jonathan C.
dc.contributor.authorJohnson, Jennifer A.
dc.contributor.authorShetrone, Matthew
dc.contributor.authorSobeck, Jennifer
dc.contributor.authorAllende Prieto, Carlos
dc.contributor.authorBizyaev, Dmitry
dc.contributor.authorCarrera, Ricardo
dc.contributor.authorCohen, Roger E.
dc.contributor.authorCunha, Katia
dc.contributor.authorEbelke, Garrett
dc.contributor.authorFernandez-Trincado, J. G.
dc.contributor.authorGarcia-Hernandez, D. A.
dc.contributor.authorHayes, Christian R.
dc.contributor.authorJonsson, Henrik
dc.contributor.authorLane, Richard R.
dc.contributor.authorMajewski, Steven R.
dc.contributor.authorMalanushenko, Viktor
dc.contributor.authorMeszaros, Szabolcs
dc.contributor.authorNidever, David L.
dc.contributor.authorNitschelm, Christian
dc.contributor.authorPan, Kaike
dc.contributor.authorRix, Hans-Walter
dc.contributor.authorRybizki, Jan
dc.contributor.authorSchiavon, Ricardo P.
dc.contributor.authorSchneider, Donald P.
dc.contributor.authorWilso, John C.
dc.contributor.authorZamora, Olga
dc.date.accessioned2025-01-23T21:17:02Z
dc.date.available2025-01-23T21:17:02Z
dc.date.issued2019
dc.description.abstractWe map the trends of elemental abundance ratios across the Galactic disk, spanning R = 3-15 kpc and midplane distance vertical bar Z vertical bar = 0-2 kpc, for 15 elements in a sample of 20,485 stars measured by the SDSS/APOGEE survey (O, Na, Mg, Al, Si, P, S, K, Ca, V, Cr, Mn, Fe, Co, Ni). Adopting Mg rather than Fe as our reference element, and separating stars into two populations based on [Fe/Mg], we find that the median trends of [X/Mg] versus [Mg/H] in each population are nearly independent of location in the Galaxy. The full multi-element cartography can be summarized by combining these nearly universal median sequences with our measured metallicity distribution functions and the relative proportions of the low-[Fe/Mg] (high-alpha) and high-[Fe/Mg] (low-alpha) populations, which depend strongly on R and vertical bar Z vertical bar. We interpret the median sequences with a semi-empirical "two-process" model that describes both the ratio of core collapse and Type Ia supernova (SN Ia) contributions to each element and the metallicity dependence of the supernova yields. These observationally inferred trends can provide strong tests of supernova nucleosynthesis calculations. Our results lead to a relatively simple picture of abundance ratio variations in the Milky Way, in which the trends at any location can be described as the sum of two components with relative contributions that change systematically and smoothly across the Galaxy. Deviations from this picture and future extensions to other elements can provide further insights into the physics of stellar nucleosynthesis and unusual events in the Galaxy's history.
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4357/ab07c7
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/1538-4357/ab07c7
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101143
dc.identifier.wosidWOS:000462738400020
dc.issue.numero1
dc.language.isoen
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.subjectGalaxy: abundances
dc.subjectGalaxy: disk
dc.subjectnuclear reactions, nucleosynthesis, abundances
dc.subjectstars: abundances
dc.titleChemical Cartography with APOGEE: Multi-element Abundance Ratios
dc.typeartículo
dc.volumen874
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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