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29 March 2024
 
  » arxiv » astro-ph/0206075

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Sulphur abundances in disk stars: a correlation with silicon
Y.Q. Chen ; P.E. Nissen G. Zhao ; M. Asplund ;
Date 5 Jun 2002
Subject astro-ph
AffiliationChina), P.E. Nissen (Denmark) G. Zhao (China), M. Asplund (Sweden
AbstractWe have performed new determinations of sulphur and silicon abundances for a sample of 26 disk stars based on high-resolution, high signal-to-noise spectra. The results indicate a solar [S/Fe] for [Fe/H] >-0.3, below which [S/Fe] increases to ~0.25 dex at [Fe/H] =-1.0. We find that there is a good correlation between [S/H] and [Si/H], indicating the same nucleosynthetic origin of the two elements. It seems that the ratio of sulphur to silicon does not depend on metallicity for [Fe/H]> -1.0. The implications of these results on models for the nucleosynthesis of alpha-capture elements and the chemical evolution of the Galaxy are discussed.
Source arXiv, astro-ph/0206075
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