The Gaia–ESO Survey: Carbon Abundance in the Galactic Thin and Thick Disks

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dc.contributor.authorBayo, Amelia
dc.date.accessioned2021-08-25T20:00:13Z
dc.date.available2021-08-25T20:00:13Z
dc.date.issued2020
dc.description.abstractThis paper focuses on carbon, which is one of the most abundant elements in the universe and is of high importance in the field of nucleosynthesis and galactic and stellar evolution. The origin of carbon and the relative importance of massive and low- to intermediate-mass stars in producing it is still a matter of debate. We aim at better understanding the origin of carbon by studying the trends of [C/H], [C/Fe], and [C/Mg] versus [Fe/H] and [Mg/H] for 2133 FGK dwarf stars from the fifth Gaia–ESO Survey internal data release (GES iDR5). The availability of accurate parallaxes and proper motions from Gaia DR2 and radial velocities from GES iDR5 allows us to compute Galactic velocities, orbits, absolute magnitudes, and, for 1751 stars, Bayesian-derived ages. Three different selection methodologies have been adopted to discriminate between thin- and thick-disk stars. In all the cases, the two stellar groups show different [C/H], [C/Fe], and [C/Mg] and span different age intervals, with the thick-disk stars being, on average, older than the thin-disk ones. The behaviors of [C/H], [C/Fe], and [C/Mg] versus [Fe/H], [Mg/H], and age all suggest that C is primarily produced in massive stars. The increase of [C/Mg] for young thin-disk stars indicates a contribution from low-mass stars or the increased C production from massive stars at high metallicities due to the enhanced mass loss. The analysis of the orbital parameters Rmed and ∣Zmax∣ supports an “inside–out” and “upside–down” formation scenario for the disks of the Milky Way.en_ES
dc.facultadFacultad de Cienciasen_ES
dc.identifier.doihttps://doi.org/10.3847/1538-4357/ab5dc4
dc.identifier.urihttp://repositoriobibliotecas.uv.cl/handle/uvscl/2269
dc.language.isoenen_ES
dc.publisherThe American Astronomical Societyen_ES
dc.sourceThe Astrophysical Journalen_ES
dc.subjectLate-type starsen_ES
dc.subjectStellar abundancesen_ES
dc.subjectStellar agesen_ES
dc.subjectGalaxy stellar contenten_ES
dc.titleThe Gaia–ESO Survey: Carbon Abundance in the Galactic Thin and Thick Disksen_ES
dc.typeArticuloen_ES
uv.catalogadorRCR DIBRAen_ES
uv.departamentoInstituto de Fisica y Astronomiaen_ES
uv.notageneralVarios autoresen_ES

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