Lithium Abundance of Metal-poor Stars

被引：0
|
作者：
Hua-Wei Zhang and Gang Zhao1 National Astronomical Observatories
2 Department of Astronomy
机构：
来源：
Chinese Journal of Astronomy and Astrophysics | 2003年 / 05期
基金：
中国国家自然科学基金;
关键词：
stars: abundances - stars: Population II - Galaxy: evolution;
D O I：
暂无
中图分类号：
P152 [恒星天文学、星系天文学];
学科分类号：
070401 ;
摘要：
High-resolution, high signal-to-noise ratio spectra have been obtained for 32 metal-poor stars. The equivalent widths of Li A6708 A were measured and the lithium abundances were derived. The average lithium abundance of 21 stars on the lithium plateau is 2.33±0.02 dex. The Lithium plateau exhibits a marginal trend along metallicity, dA(Li)/d[Fe/H] ?0.12±0.06, and no clear trend with the effective temperature. The trend indicates that the abundance of lithium plateau may not be primordial and that a part of the lithium was produced in Galactic Chemical Evolution (GCE).
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收藏
页码：453 / 457
页数：5
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