A search for Mg-poor stars using LAMOST survey data
文献类型：期刊论文
| 作者 | Xing, Qian-Fan1,2 ; Zhao, Gang1; Zhang, Yong3; Hou, Yong-Hui3; Wang, Yue-Fei3; Wu, Yue1; Xing Qianfan; Wu Yue; Zhao Gang
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2015-08-01 |
| 卷号 | 15期号:8页码:1275-1281 |
| 关键词 | methods: data analysis stars: abundance stars: atmospheres |
| 英文摘要 | Most Galactic metal-poor stars exhibit enhanced alpha-abundances (e.g. [Mg/Fe] similar to +0.4) according to previous studies of stellar chemical compositions. However, a handful of metal-poor stars with large deficiencies in Mg (e.g. [Mg/Fe] similar to -0.2) show severe departures from this alpha-enhancement trend. The sub-solar [Mg/Fe] ratios of these anomalous stars indicate that they possess different chemical enrichment histories than the majority of Galactic metal-poor stars. In previous work, we presented a method to select Mg-poor metal-poor stars from low-resolution SDSS spectra based on a spectral matching technique. In this paper, a similar method is applied to low-resolution (R similar to 1800) LAMOST spectra. Stellar [Mg/Fe] abundances are determined by using stellar parameters delivered by the LAMOST Data Release 2 catalog. From a sample of similar to 60 000 stars with atmospheric parameters in the range T-eff = [5500, 6500] K and [Fe/H] = [-2.4, + 0.5], we select 15 candidate Mg-poor metal-poor stars. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000360553400012 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5600]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Nanjing Inst Astron Opt & Technol, Natl Astron Observ, Nanjing 210042, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xing, Qian-Fan,Zhao, Gang,Zhang, Yong,et al. A search for Mg-poor stars using LAMOST survey data[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2015,15(8):1275-1281. |
| APA | Xing, Qian-Fan.,Zhao, Gang.,Zhang, Yong.,Hou, Yong-Hui.,Wang, Yue-Fei.,...&Zhao Gang.(2015).A search for Mg-poor stars using LAMOST survey data.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,15(8),1275-1281. |
| MLA | Xing, Qian-Fan,et al."A search for Mg-poor stars using LAMOST survey data".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 15.8(2015):1275-1281. |
入库方式： OAI收割
来源：国家天文台
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