APOGEE-2S Mg-Al anti-correlation of the metal-poor globular cluster NGC 2298

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dc.contributor.authorBaeza, Ian
dc.contributor.authorFernández-Trincado, José G.
dc.contributor.authorVillanova, Sandro
dc.contributor.authorGeisler, Doug
dc.contributor.authorMinniti, Dante
dc.contributor.authorGarro, Elisa R.
dc.contributor.authorBarbuy, Beatriz
dc.contributor.authorBeers, Timothy C.
dc.contributor.authorLane, Richard R.
dc.date.accessioned2024-04-26T19:01:03Z
dc.date.available2024-04-26T19:01:03Z
dc.date.issued2022-06-01
dc.descriptionIndexación: Scopus.
dc.description.abstractWe present detailed elemental abundances and radial velocities of stars in the metal-poor globular cluster (GC) NGC 2298, based on near-infrared high-resolution (R 22-500) spectra of 12 members obtained during the second phase of the Apache Point Observatory Galactic Evolution Experiment (APOGEE-2) at Las Campanas Observatory as part of the seventeenth Data Release (DR 17) of the Sloan Digital Sky Survey IV (SDSS-IV). We employed the Brussels Automatic Code for Characterizing High accuracy Spectra (BACCHUS) software to investigate abundances for a variety of species including α elements (Mg, Si, and Ca), the odd-Z element Al, and iron-peak elements (Fe and Ni) located in the innermost regions of NGC 2298. We find a mean and median metallicity [Fe/H 1.76 and 1.75, respectively, with a star-to-star spread of 0.14 dex, which is compatible with the internal measurement errors. Thus, we find no evidence for an intrinsic [Fe/H] abundance spread in NGC 2298. The typical α-element enrichment in NGC 2298 is overabundant relative to the Sun, and it follows the trend of other metal-poor GCs. We confirm the existence of an Al-enhanced population in this cluster, which is clearly anti-correlated with Mg, indicating the prevalence of the multiple-population phenomenon in NGC 2298. © ESO 2022
dc.description.urihttps://www.aanda.org/articles/aa/full_html/2022/06/aa43475-22/aa43475-22.html
dc.identifier.citationAstronomy and Astrophysics, Volume 662, 1 June 2022, Article number A47
dc.identifier.doi10.1051/0004-6361/202243475
dc.identifier.issn0004-6361
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/56424
dc.language.isoen
dc.publisherEDP Sciences
dc.rights.licenseCC BY 4.0 DEED Attribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectGlobular clusters: individual: NGC 2298
dc.subjectStars: abundances
dc.subjectStars: chemically peculiar
dc.subjectTechniques: spectroscopic
dc.titleAPOGEE-2S Mg-Al anti-correlation of the metal-poor globular cluster NGC 2298
dc.typeArtículo
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