The abundances of nearby red clump giants

被引：37
|
作者：
Liu, Y. J. [1 ]
Zhao, G.
Shi, J. R.
Pietrzynski, G.
Gieren, W.
机构：
[1] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
[3] Univ Concepcion, Dept Fis, Concepcion, Chile
[4] Univ Warsaw Observ, PL-00478 Warsaw, Poland
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2007年 / 382卷 / 02期
关键词：
stars : abundances; stars : atmospheres; stars : late-type;
D O I：
10.1111/j.1365-2966.2007.11852.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Based on the analysis of high-resolution spectra with a high signal-to-noise ratio, we have determined the abundances of the alpha-elements O, Si, Ca and Ti, the iron peak elements V, Fe and Ni, and the heavy element Ba without the consideration of non-local thermodynamic equilibrium (NLTE) effect and the light neutron-rich elements Na, Mg and Al with an NLTE analysis for 63 nearby red clump giants. Fe abundances cover a logarithmic range between -0.60 and +0.35 relative to solar. All abundance ratios with respect to Fe are similar to those found in the Sun. Hyperfine structure (HFS) was taken into account when calculating V lines. The difference in abundances obtained with and without HFS can be as large as 0.5 dex.
引用
收藏
页码：553 / 566
页数：14
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