CHEMICAL COMPOSITIONS OF KINEMATICALLY SELECTED OUTER HALO STARS
文献类型：期刊论文
| 作者 | Zhang, Lan1,2 ; Ishigaki, Miho3; Aoki, Wako4,5; Zhao, Gang1; Chiba, Masashi3
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2009-12-01 |
| 卷号 | 706期号:2页码:1095-1113 |
| 关键词 | Galaxy: abundances Galaxy: evolution Galaxy: halo stars: abundances |
| 英文摘要 | Chemical abundances of 26 metal-poor dwarfs and giants are determined from high-resolution and high signal-to-noise ratio spectra obtained with the Subaru/High Dispersion Spectrograph. The sample is selected so that most of the objects have outer-halo kinematics. Self-consistent atmospheric parameters were determined by an iterative procedure based on spectroscopic analysis. Abundances of 13 elements, including alpha-elements (Mg, Si, Ca, Ti), odd-Z light elements (Na, Sc), iron-peak elements (Cr, Mn, Fe, Ni, Zn), and neutron-capture elements (Y, Ba), are determined by two independent data reduction and local thermodynamic equillibrium analysis procedures, confirming the consistency of the stellar parameters and abundances results. We find a decreasing trend of [alpha/Fe] with increasing [Fe/H] for the range of -3.5 < [Fe/H] < -1, as found by Stephens & Boesgaard. [Zn/Fe] values of most objects in our sample are slightly lower than the bulk of halo stars previously studied. These results are discussed as possible chemical properties of the outer halo in the Galaxy. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000271872900013 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7526]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.CAS, Natl Astron Observ, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Tohoku Univ, Astron Inst, Sendai, Miyagi 9808578, Japan 4.Natl Astron Observ Japan, Tokyo 1818588, Japan 5.Grad Univ Adv Studies SOKENDAI, Sch Phys Sci, Dept Astron Sci, Tokyo 1818588, Japan |
| 推荐引用方式 GB/T 7714 | Zhang, Lan,Ishigaki, Miho,Aoki, Wako,et al. CHEMICAL COMPOSITIONS OF KINEMATICALLY SELECTED OUTER HALO STARS[J]. ASTROPHYSICAL JOURNAL,2009,706(2):1095-1113. |
| APA | Zhang, Lan,Ishigaki, Miho,Aoki, Wako,Zhao, Gang,&Chiba, Masashi.(2009).CHEMICAL COMPOSITIONS OF KINEMATICALLY SELECTED OUTER HALO STARS.ASTROPHYSICAL JOURNAL,706(2),1095-1113. |
| MLA | Zhang, Lan,et al."CHEMICAL COMPOSITIONS OF KINEMATICALLY SELECTED OUTER HALO STARS".ASTROPHYSICAL JOURNAL 706.2(2009):1095-1113. |
入库方式： OAI收割
来源：国家天文台
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