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First high-precision differential abundance analysis of extremely metal-poor stars

Reggiani, Henrique; Meléndez, J; Yong, David; Ramírez, I; Asplund, Martin


Context. Studies of extremely metal-poor stars indicate that chemical abundance ratios [X/Fe] have a root mean square scatter as low as 0.05 dex (12%). It remains unclear whether this reflects observational uncertainties or intrinsic astrophysical scatter arising from physical conditions in the interstellar medium at early times. Aims. We measure differential chemical abundance ratios in extremely metal-poor stars to investigate the limits of precision and to understand whether cosmic...[Show more]

CollectionsANU Research Publications
Date published: 2016
Type: Journal article
Source: Astronomy and Astrophysics
DOI: 10.1051/0004-6361/201527439
Access Rights: Open Access


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