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A Chemical Signature from Fast-rotating Low-metallicity Massive Stars: ROA 276 in ω Centauri

Yong, David; Norris, John; Da Costa, Gary; Stanford, Laura; Karakas, Amanda; Shingles, Luke; Hirschi, Raphael; Pignatari, Marco


We present a chemical abundance analysis of a metal-poor star, ROA 276, in the stellar system ω Centauri. We confirm that this star has an unusually high [Sr/Ba] abundance ratio. Additionally, ROA 276 exhibits remarkably high abundance ratios, [X/Fe], for all elements from Cu to Mo along with normal abundance ratios for the elements from Ba to Pb. The chemical abundance pattern of ROA 276, relative to a primordial ω Cen star ROA 46, is best fit by a fast-rotating low-metallicity massive...[Show more]

CollectionsANU Research Publications
Date published: 2017
Type: Journal article
Source: The Astrophysical Journal
DOI: 10.3847/1538-4357/aa6250
Access Rights: Open Access


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