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

页码：553 / 566

页数：14

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