Homogeneous analysis of globular clusters from the APOGEE survey with the BACCHUS code – II. The Southern clusters and overview

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dc.contributor.authorSzabolcs, Meszaros
dc.contributor.authorMasseron, Thomas
dc.contributor.authorGarcía-Hernandez, D. A.
dc.contributor.authorAllende Prieto, Carlos
dc.contributor.authorBeers, Timothy C.
dc.contributor.authorBizyaev, Dmitry
dc.contributor.authorChojnowski, Drew
dc.contributor.authorCohen, Roger E.
dc.contributor.authorCunha, Katia
dc.contributor.authorDell’Agli, Flavia
dc.contributor.authorEbelke, Garrett
dc.contributor.authorFernandez-Trincado, Jose G.
dc.contributor.authorFrinchaboy, Peter
dc.contributor.authorGeisler, Doug
dc.contributor.authorHasselquist, Sten
dc.contributor.authorHearty, Fred
dc.contributor.authorHoltzman, Jon
dc.contributor.authorJohnson, Jennifer
dc.contributor.authorLane, Richard R
dc.contributor.authorLacerna, Ivan
dc.contributor.authorLonga-Pena, Penelope
dc.contributor.authorMajewski, Steven R.
dc.contributor.authorMartell, Sarah L
dc.contributor.authorMinniti, Dante
dc.contributor.authorNataf, David
dc.contributor.authorNidever, David L.
dc.contributor.authorPan, Kaike
dc.contributor.authorSchiavon, Ricardo P.
dc.contributor.authorShetrone, Matthew
dc.contributor.authorSmith, Verne V.
dc.contributor.author. Sobeck, Jennifer S
dc.contributor.authorStringfellow, Guy S.
dc.contributor.authorSzigeti, Laszlo
dc.contributor.authorTang, Baitian
dc.contributor.authorWilson, John C.
dc.contributor.authorZamora, Olga
dc.date.accessioned2021-10-14T14:00:40Z
dc.date.available2021-10-14T14:00:40Z
dc.date.issued2020-02
dc.description.abstractWe investigate the Fe, C, N, O, Mg, Al, Si, K, Ca, Ce, and Nd abundances of 2283 red giant stars in 31 globular clusters from high-resolution spectra observed in both the Northern and Southern hemisphere by the SDSS-IV APOGEE-2 survey. This unprecedented homogeneous data set, largest to date, allows us to discuss the intrinsic Fe spread, the shape, and statistics of Al-Mg and N-C anti-correlations as a function of cluster mass, luminosity, age, and metallicity for all 31 clusters. We find that the Fe spread does not depend on these parameters within our uncertainties including cluster metallicity, contradicting earlier observations. We do not confirm the metallicity variations previously observed in M22 and NGC 1851. Some clusters show a bimodal Al distribution, while others exhibit a continuous distribution as has been previously reported in the literature. We confirm more than two populations in ω Cen and NGC 6752, and find new ones in M79. We discuss the scatter of Al by implementing a correction to the standard chemical evolution of Al in the Milky Way. After correction, its dependence on cluster mass is increased suggesting that the extent of Al enrichment as a function of mass was suppressed before the correction. We observe a turnover in the Mg-Al anticorrelation at very low Mg in ω Cen, similar to the pattern previously reported in M15 and M92. ω Cen may also have a weak K-Mg anticorrelation, and if confirmed, it would be only the third cluster known to show such a patternes
dc.description.sponsorshipIndexación: Scopuses
dc.identifier.citationMonthly Notices of the Royal Astronomical Society Open AccessVolume 492, Issue 2, Pages 1641 - 16701 February 2020es
dc.identifier.issn00358711
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/20442
dc.language.isoenes
dc.publisherOxford University Presses
dc.subjectastronomical data bases: miscellaneous – surveys – stars, galaxies: abundances – stars: late-type – globular clusters: general – galaxies: fundamental parameters.es
dc.titleHomogeneous analysis of globular clusters from the APOGEE survey with the BACCHUS code – II. The Southern clusters and overviewes
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