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On the abundance of potassium in metal-poor stars
Takeda, Y; Zhao, G; Chen, YQ; Qiu, HM; Takada-Hidai, M
2002
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
卷号54期号:2页码:275-284
摘要Based on extensive statistical-equilibrium calculations, we performed a non-LTE analysis of the K I 7699 equivalent-width data of metal-deficient stars for the purpose of clarifying the behavior of the photospheric potassium abundance in disk/halo stars. While the resulting non-LTE abundance corrections turned out to be considerably large, amounting to 0.2-0.7 dex, their effect on the [K/Fe] vs, [Fe/H] relation is not very important, since these corrections do not show any significant dependence on the metallicity. Hence, we again confirmed the results of previous LTE studies, that [K/Fe] shows a gradual systematic increase toward a lowered metallicity up to [K/Fe] similar to 0.3-0.5 at [Fe/H] similar to -1 to -2, such as in the case of alpha elements.
关键词Galaxy : Evolution Line : Formation Stars : Abundances Stars : Atmospheres Stars : Late-type
收录类别SCI
语种英语
WOS记录号WOS:000175349400019
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8545
专题光学天文研究部
作者单位1.Komazawa Univ, Tokyo 1548525, Japan
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
3.Tokai Univ, Liberal Arts Educ Ctr, Kanagawa 2591292, Japan
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Takeda, Y,Zhao, G,Chen, YQ,et al. On the abundance of potassium in metal-poor stars[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2002,54(2):275-284.
APA Takeda, Y,Zhao, G,Chen, YQ,Qiu, HM,&Takada-Hidai, M.(2002).On the abundance of potassium in metal-poor stars.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,54(2),275-284.
MLA Takeda, Y,et al."On the abundance of potassium in metal-poor stars".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 54.2(2002):275-284.
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