First high-precision differential abundance analysis of extremely metal-poor stars
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]
|Collections||ANU Research Publications|
|Source:||Astronomy and Astrophysics|
|Access Rights:||Open Access|
|01_Reggiani_First_high-precision_2016.pdf||267.47 kB||Adobe PDF|
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