Chemical abundances of 10 metal-poor halo stars
文献类型：期刊论文
| 作者 | Bai, GS; Zhao, G ; Chen, YQ; Shi, JR; Klochkova, VG; Panchuk, VE; Qiu, HM; Zhang, HW
|
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2004-10-01 |
| 卷号 | 425期号:2页码:671-681 |
| 关键词 | stars : abundances stars : fundamental parameters Galaxy : abundances Galaxy : halo |
| 英文摘要 | We present observations of ten metal-poor halo stars with the metallicity range -2.3<[Fe/H]<-1.4 and derive their stellar parameters, acquire some elemental abundances relative to iron and discuss the relation between the abundance ratio and the metallicity. It was found that oxygen abundances are nearly constant at a level of 0.6 dex for our metal-poor halo stars when the non-LTE correction is considered. The alpha-elements (Mg, Si, Ca and Ti) are overabundant relative to Fe and decrease with increasing metallicity. We also obtained a significant underabundant non-LTE [Na/Fe] ratio from Na I D lines which have a large deviation from the LTE assumption. Scandium is marginally overabundant with respect to iron and tends to decrease with increasing metallicity like the alpha-elements. A nearly solar value of [Cr/Fe] ratio and underabundant [Mn/Fe] ratio are obtained. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000224526500027 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6938]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 369167, Russia 3.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bai, GS,Zhao, G,Chen, YQ,et al. Chemical abundances of 10 metal-poor halo stars[J]. ASTRONOMY & ASTROPHYSICS,2004,425(2):671-681. |
| APA | Bai, GS.,Zhao, G.,Chen, YQ.,Shi, JR.,Klochkova, VG.,...&Zhang, HW.(2004).Chemical abundances of 10 metal-poor halo stars.ASTRONOMY & ASTROPHYSICS,425(2),671-681. |
| MLA | Bai, GS,et al."Chemical abundances of 10 metal-poor halo stars".ASTRONOMY & ASTROPHYSICS 425.2(2004):671-681. |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。