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).

引用

页码：453 / 457

页数：5