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An elemental assay of very, extremely, and ultra-metal-poor stars

Hansen, Terese; Hansen, C. J.; Christlieb, N; Beers, Timothy C; Yong, David; Bessell, Michael; Frebel, Anna; García Pérez, A. E.; Placco, V. M.; Norris, John; Asplund, Martin


We present a high-resolution elemental-abundance analysis for a sample of 23 very metal-poor ([Fe/H] < −2.0) stars, 12 of which are extremely metal-poor ([Fe/H] < −3.0), and 4 of which are ultra-metal-poor ([Fe/H] < −4.0). These stars were targeted to explore differences in the abundance ratios for elements that constrain the possible astrophysical sites of element production, including Li, C, N, O, the α-elements, the iron-peak elements, and a number of neutron-capture elements. This sample...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
Source: The Astrophysical Journal
DOI: 10.1088/0004-637X/807/2/173


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