Two Portions of the Sagittarius Stream in the LAMOST Complete Spectroscopic Survey of Pointing Area at the Southern Galactic Cap
文献类型：期刊论文
| 作者 | Zhao,J. K.4; Ye,X. H.3,4; Wu,H.3,4; Yang,M.2,4; Oswalt,Terry D.1; Xue,X. X.4; Chen,Y. Q.3,4; Zhang,J. J.3,4; Zhao,G.3,4 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2020-11-01 |
| 卷号 | 904期号:1 |
| 关键词 | Stellar abundances Galaxy kinematics |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/abbc1f |
| 英文摘要 | Abstract We constructed a sample of 13,798 stars with Teff, log g, [Fe/H], radial velocity, proper motions, and parallaxes from LAMOST DR5 and Gaia DR2 in the LAMOST Complete Spectroscopic Survey of Pointing Area (LaCoSSPAr) at the Southern Galactic Cap consisting of areas A and B. Using the distributions in both proper motions and radial velocity, we detected very significant overdensities in these two areas. These substructures most likely are portions of the Sagittarius (Sgr) stream. With the Density-Based Spatial Clustering of Applications with Noise (DBSCAN) algorithm, 220 candidates stream members were identified. Based upon distance to the Sun and published models, 106 of these stars are likely to be the members of the Sgr stream. The abundance pattern of these members using [α/Fe] from Xiang et al. were found to be similar to Galactic field stars with [Fe/H]? ?1.0. No vertical and only small radial gradients in metallicity along the orbit of the Sgr stream were found in our Sgr stream candidates. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-904-1-ABBC1F |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/62455]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Zhao,J. K. |
| 作者单位 | 1.Embry-Riddle Aeronautical University, Aerospace Boulevard, Daytona Beach, FL 32114, USA; oswaltt1@erau.edu 2.IAASARS, National Observatory of Athens, Vas. Pavlou and I. Metaxa, Penteli 15236, Greece 3.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, 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; zjk@nao.cas.cn, hwu@nao.cas.cn, myang@nao.cas.cn |
| 推荐引用方式 GB/T 7714 | Zhao,J. K.,Ye,X. H.,Wu,H.,et al. Two Portions of the Sagittarius Stream in the LAMOST Complete Spectroscopic Survey of Pointing Area at the Southern Galactic Cap[J]. The Astrophysical Journal,2020,904(1). |
| APA | Zhao,J. K..,Ye,X. H..,Wu,H..,Yang,M..,Oswalt,Terry D..,...&Zhao,G..(2020).Two Portions of the Sagittarius Stream in the LAMOST Complete Spectroscopic Survey of Pointing Area at the Southern Galactic Cap.The Astrophysical Journal,904(1). |
| MLA | Zhao,J. K.,et al."Two Portions of the Sagittarius Stream in the LAMOST Complete Spectroscopic Survey of Pointing Area at the Southern Galactic Cap".The Astrophysical Journal 904.1(2020). |
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。