Sulphur and zinc abundances in galactic halo stars revisited
Aims. Based on a new set of sulphur abundances in very metal-poor stars and an improved analysis of previous data, we aim at resolving current discrepancies on the trend of S/Fe vs. Fe/H and thereby gain better insight into the nucleosynthesis of sulphur. The trends of Zn/Fe and S/Zn will also be studied. Methods. High resolution VLT/UVES spectra of 40 main-sequence stars with -3.3 < [Fe/H] < -1.0 are used to derive S abundances from the weak λ8694.6 S I line and the stronger λλ9212.9, 9237.5...[Show more]
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|Source:||Astronomy and Astrophysics|
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