Exploring the Galactic Anticenter Substructure with LAMOST and Gaia DR2
文献类型：期刊论文
| 作者 | Li,Jing2,3; Xue,Xiang-Xiang4,6; Liu,Chao5,6 ; Zhang,Bo1; Rix,Hans-Walter7; Carlin,Jeffrey L.8; Yang,Chengqun9; Mendez,Rene A.10; Zhong,Jing9; Tian,Hao5
|
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2021-03-01 |
| 卷号 | 910期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | Milky Way stellar halo Milky Way disk Stellar kinematics Chemical abundances |
| DOI | 10.3847/1538-4357/abd9bf |
| 英文摘要 | Abstract We characterize the kinematic and chemical properties of 589 Galactic anticenter substructure stars (GASS) with K/M giants in integrals-of-motion space. These stars likely include members of previously identified substructures such as Monoceros, A13, and the Triangulum-Andromeda cloud. We show that these stars are in nearly circular orbits on both sides of the Galactic plane. We can see a velocity (VZ) gradient along Y-axis especially for the south GASS members. Our GASS members have similar energy and angular momentum distributions to thin-disk stars. Their location in [α/M] versus [M/H] space is more metal-poor than typical thin-disk stars, with [α/M] lower than that of the thick disk. We infer that our GASS members are part of the outer metal-poor disk stars and that the outer disk extends to 30 kpc. Considering the distance range and α-abundance features, GASS could be formed after the thick disk was formed due to the molecular cloud density decreasing in the outer disk where the star-formation rate might be less efficient compared to the inner disk. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-910-1-ABD9BF |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/59935]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Xue,Xiang-Xiang |
| 作者单位 | 1.Department of Astronomy, Beijing Normal University, Beijing 100875, People’s Republic of China 2.Physics and Space Science College, China West Normal University, 1 ShiDa Road, Nanchong 637002, People’s Republic of China; lijing@bao.ac.cn 3.Chinese Academy of Sciences South America Center for Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China 4.CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China; xuexx@nao.cas.cn 5.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China 6.School of Astronomy and Space Science, University of Chinese Academy of Sciences, 19A Yuquan Road, Shijingshan District, Beijing 100049, People’s Republic of China 7.Max-Planck-Institut für Astronomie, K?nigstuhl 17, D-69117 Heidelberg, Germany 8.AURA/Rubin Observatory, 950 North Cherry Avenue, Tucson, AZ 85719, USA 9.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People’s Republic of China 10.Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Correo Central, Santiago, Chile |
| 推荐引用方式 GB/T 7714 | Li,Jing,Xue,Xiang-Xiang,Liu,Chao,et al. Exploring the Galactic Anticenter Substructure with LAMOST and Gaia DR2[J]. The Astrophysical Journal,2021,910(1). |
| APA | Li,Jing.,Xue,Xiang-Xiang.,Liu,Chao.,Zhang,Bo.,Rix,Hans-Walter.,...&Chang,Ruixiang.(2021).Exploring the Galactic Anticenter Substructure with LAMOST and Gaia DR2.The Astrophysical Journal,910(1). |
| MLA | Li,Jing,et al."Exploring the Galactic Anticenter Substructure with LAMOST and Gaia DR2".The Astrophysical Journal 910.1(2021). |
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。