THREE MOVING GROUPS DETECTED IN THE LAMOST DR1 ARCHIVE
文献类型：期刊论文
| 作者 | Zhao, J. K.1; Zhao, G.1 ; Chen, Y. Q.1; Oswalt, T. D.2; Tan, K. F.1; Zhang, Y.3
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2014-05-20 |
| 卷号 | 787期号:1 |
| 关键词 | Galaxy: kinematics and dynamics |
| 英文摘要 | We analyze the kinematics of thick disk and halo stars observed by the Large Sky Area Multi-Object Fiber Spectroscopic Telescope. We have constructed a sample of 7993 F, G, and K nearby main-sequence stars (d < 2 kpc) with estimates of position (x, y, z) and space velocity (U, V, W) based on color and proper motion from the Sloan Digital Sky Survey DR9 catalog. Three "phase-space overdensities" are identified in (V, root U-2 + 2V(2)) with significance levels of sigma > 3. Two of them (the Hyades-Pleiades stream and the Arcturus-AF06 stream) have been identified previously. We also find evidence for a new stream (centered at V similar to -180 km s(-1)) in the halo. The formation mechanisms of these three streams are analyzed. Our results support the hypothesis that the Arcturus-AF06 stream and the new stream originated from the debris of a disrupted satellite, while the Hyades-Pleiades stream has a dynamical origin. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000335924200031 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6402]  |
| 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.Embry Riddle Aeronaut Univ, Daytona Beach, FL 32114 USA 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, J. K.,Zhao, G.,Chen, Y. Q.,et al. THREE MOVING GROUPS DETECTED IN THE LAMOST DR1 ARCHIVE[J]. ASTROPHYSICAL JOURNAL,2014,787(1). |
| APA | Zhao, J. K.,Zhao, G.,Chen, Y. Q.,Oswalt, T. D.,Tan, K. F.,&Zhang, Y..(2014).THREE MOVING GROUPS DETECTED IN THE LAMOST DR1 ARCHIVE.ASTROPHYSICAL JOURNAL,787(1). |
| MLA | Zhao, J. K.,et al."THREE MOVING GROUPS DETECTED IN THE LAMOST DR1 ARCHIVE".ASTROPHYSICAL JOURNAL 787.1(2014). |
入库方式： OAI收割
来源：国家天文台
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