A Chemical Signature from Fast-rotating Low-metallicity Massive Stars: ROA 276 in ω Centauri
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Yong, David; Norris, John; Da Costa, Gary; Stanford, Laura; Karakas, Amanda; Shingles, Luke; Hirschi, Raphael; Pignatari, Marco
Description
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]
Collections | ANU Research Publications |
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Date published: | 2017 |
Type: | Journal article |
URI: | http://hdl.handle.net/1885/210083 |
Source: | The Astrophysical Journal |
DOI: | 10.3847/1538-4357/aa6250 |
Access Rights: | Open Access |
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1702.07087-1.pdf | 734.21 kB | Adobe PDF |
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