On the abundance of potassium in metal-poor stars
文献类型：期刊论文
| 作者 | Takeda, Y; Zhao, G ; Chen, YQ; Qiu, HM; Takada-Hidai, M
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| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
 |
| 出版日期 | 2002 |
| 卷号 | 54期号:2页码:275-284 |
| 关键词 | galaxy : evolution line : formation stars : abundances stars : atmospheres stars : late-type |
| 英文摘要 | 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. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000175349400019 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8545]  |
| 专题 | 国家天文台_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 |
| 推荐引用方式 GB/T 7714 | 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. |
入库方式： OAI收割
来源：国家天文台
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