Element Abundance Analysis of the Metal-rich Stellar Halo and High-velocity Thick Disk in the Galaxy
文献类型：期刊论文
| 作者 | Zhu,Haifan4; Du,Cuihua1; Yan,Yepeng4,5; Shi,Jianrong1,3 ; Ma,Jun1,3; Newberg,Heidi Jo2
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| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2021-06-28 |
| 卷号 | 915期号:1 |
| 关键词 | Galaxy disks Galaxy kinematics Galaxy abundances Galaxy structure Galaxy stellar halos |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/abff52 |
| 英文摘要 | Abstract Based on the second Gaia data release (DR2) and APOGEE (DR16) spectroscopic surveys, we define two kinds of star samples: high-velocity thick disk (HVTD) with v? > 90 km s?1 and metal-rich stellar halo (MRSH) with v? < 90 km s?1. Due to high-resolution spectra data from APOGEE (DR16), we can accurately analyze the element abundance distribution of HVTD and MRSH. These element abundances constitute a multidimensional data space, and we introduce an algorithm method for processing multidimensional data to give the result of dimensionality reduction clustering. According to chemical property analysis, we derive that some HVTD stars could originate from the thin disk and some MRSH stars could originate from dwarf galaxies, but those stars that have similar chemical abundance characteristics in both samples may form in situ. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-915-1-ABFF52 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/57344]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Du,Cuihua |
| 作者单位 | 1.College of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China; ducuihua@ucas.ac.cn 2.Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180, USA 3.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China 4.School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China 5.Department of Astronomy, Beijing Normal University, Beijing 100875, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Zhu,Haifan,Du,Cuihua,Yan,Yepeng,et al. Element Abundance Analysis of the Metal-rich Stellar Halo and High-velocity Thick Disk in the Galaxy[J]. The Astrophysical Journal,2021,915(1). |
| APA | Zhu,Haifan,Du,Cuihua,Yan,Yepeng,Shi,Jianrong,Ma,Jun,&Newberg,Heidi Jo.(2021).Element Abundance Analysis of the Metal-rich Stellar Halo and High-velocity Thick Disk in the Galaxy.The Astrophysical Journal,915(1). |
| MLA | Zhu,Haifan,et al."Element Abundance Analysis of the Metal-rich Stellar Halo and High-velocity Thick Disk in the Galaxy".The Astrophysical Journal 915.1(2021). |
入库方式： OAI收割
来源：国家天文台
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