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Sulphur abundances in disk stars: A correlation with silicon
Chen, YQ; Nissen, PE; Zhao, G; Asplund, M
2002-07-01
发表期刊ASTRONOMY & ASTROPHYSICS
卷号390期号:1页码:225-233
摘要We 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 similar to0.25 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.
关键词Stars : Abundances Stars : Late-type Galaxy : Evolution
DOI10.1051/0004-6361:20020735
收录类别SCI
语种英语
WOS记录号WOS:000176980000028
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8528
专题光学天文研究部
作者单位1.Aarhus Univ, Inst Phys & Astron, DK-8000 Aarhus C, Denmark
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
3.Uppsala Astron Observ, S-75120 Uppsala, Sweden
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Chen, YQ,Nissen, PE,Zhao, G,et al. Sulphur abundances in disk stars: A correlation with silicon[J]. ASTRONOMY & ASTROPHYSICS,2002,390(1):225-233.
APA Chen, YQ,Nissen, PE,Zhao, G,&Asplund, M.(2002).Sulphur abundances in disk stars: A correlation with silicon.ASTRONOMY & ASTROPHYSICS,390(1),225-233.
MLA Chen, YQ,et al."Sulphur abundances in disk stars: A correlation with silicon".ASTRONOMY & ASTROPHYSICS 390.1(2002):225-233.
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