Halo stream candidates in the LAMOST DR2
文献类型：期刊论文
| 作者 | Zhao, Jing-Kun1 ; Zhao, Gang1; Chen, Yu-Qin1; Tan, Ke-Feng1; Gao, Meng-Tian2; Yang, Ming1; Zhang, Yong3; Hou, Yong-Hui3; Chen Yuqin; Zhao Gang
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2015-08-01 |
| 卷号 | 15期号:8页码:1378-1391 |
| 关键词 | Galaxy: kinematics and dynamics |
| 英文摘要 | We have cross-matched the LAMOST DR2 with the WISE, 2MASS and PPMXL catalogs and obtained a sample of 64 819 FGK metal-poor dwarfs with [Fe/H] < -0.7, distances within 2 kpc from the Sun and reliable kinematics (space velocities, angular momenta and eccentricities). With a detection strategy for halo streams provided by Klement et al, nine significant "phase-space overdensities" with stars on very similar orbits are identified from this sample. Among these overdensities, three were previously known and six are new stream candidates. The kinematics and metallicities of these stream candidates are then analyzed; they have typical halo characteristics. We have extracted the most probable members of each halo stream according to their angles with respect to the North Galactic Pole and investigate the distribution of the angular momenta to further verify their existences. Detailed study of elemental abundances for these members based on high resolution and high signal-to-noise spectra from follow-up observations in the near future is of high interest to understand the origin of these streams. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000360553400021 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5602]  |
| 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.China Univ Geosci, CUG Fac Resources, Wuhan 430074, 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 | Zhao, Jing-Kun,Zhao, Gang,Chen, Yu-Qin,et al. Halo stream candidates in the LAMOST DR2[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2015,15(8):1378-1391. |
| APA | Zhao, Jing-Kun.,Zhao, Gang.,Chen, Yu-Qin.,Tan, Ke-Feng.,Gao, Meng-Tian.,...&Yang Ming.(2015).Halo stream candidates in the LAMOST DR2.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,15(8),1378-1391. |
| MLA | Zhao, Jing-Kun,et al."Halo stream candidates in the LAMOST DR2".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 15.8(2015):1378-1391. |
入库方式： OAI收割
来源：国家天文台
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