| Discovery of Two New Hypervelocity Stars from the LAMOST Spectroscopic Surveys | |
Huang, Y.1,2,7; Liu, X. -W.1,2,3; Zhang, H. -W.2,3; Chen, B. -Q.1; Xiang, M. -S.4,7; Wang, C.2; Yuan, H. -B.5; Tian, Z. -J.2,7; Li, Y. -B.4; Wang B(王博)6
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| 发表期刊 | ASTROPHYSICAL JOURNAL LETTERS
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| 2017-09-20 | |
| 卷号 | 847期号:1 |
| DOI | 10.3847/2041-8213/aa894b |
| 产权排序 | 第6完成单位 |
| 收录类别 | SCI |
| 关键词 | Galaxy: Center Galaxy: Halo Galaxy: Kinematics And Dynamics Stars: Early-type |
| 摘要 | We report the discovery of two new unbound hypervelocity stars (HVSs) from the LAMOST spectroscopic surveys. They are, respectively, a B2V-type star of similar to 7M(circle dot) with a Galactic rest-frame radial velocity of 502 km s(-1) at a Galactocentric radius of similar to 21 kpc and a B7V-type star of similar to 4M(circle dot) with a Galactic rest-frame radial velocity of 408 km s-1 at a Galactocentric radius of similar to 30 kpc. The origins of the two HVSs are not clear given their currently poorly measured proper motions. However, the future data releases of Gaia should provide proper motion measurements accurate enough to solve this problem. The ongoing LAMOST spectroscopic surveys are expected to yield more HVSs to form a statistical sample, providing vital constraints on understanding the nature of HVSs and their ejection mechanisms. |
| 资助项目 | National Key Basic Research Program of China[2014CB845700] ; China Postdoctoral Science Foundation[2016M600849] ; National Natural Science Foundation of China[11233004] ; National Natural Science Foundation of China[11233004] ; Special fund for Advanced Users ; National Development and Reform Commission |
| 项目资助者 | National Key Basic Research Program of China[2014CB845700] ; China Postdoctoral Science Foundation[2016M600849] ; National Natural Science Foundation of China[11473001, 11233004] ; Special fund for Advanced Users ; National Development and Reform Commission |
| 语种 | 英语 |
| 学科领域 | 天文学 ; 恒星与银河系 ; 恒星天文学 |
| 文章类型 | Article |
| 出版者 | IOP PUBLISHING LTD |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| ISSN | 2041-8205 |
| URL | 查看原文 |
| WOS记录号 | WOS:000411410700001 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | GALACTIC HALO ; BLACK-HOLE ; ORIGIN ; MASS ; EJECTION ; MILKY |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/11943 |
| 专题 | 大样本恒星演化研究组 中国科学院天体结构与演化重点实验室 |
| 通讯作者 | Huang, Y. |
| 作者单位 | 1.South-Western Institute for Astronomy Research, Yunnan University, Kunming 650500, China 2.Department of Astronomy, Peking University, Beijing 100871, China 3.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China 4.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 5.Department of Astronomy, Beijing Normal University, Beijing 100875, China 6.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatories, CAS, Kunming 650216, China 7.LAMOST Fellow. |
| 推荐引用方式 GB/T 7714 | Huang, Y.,Liu, X. -W.,Zhang, H. -W.,et al. Discovery of Two New Hypervelocity Stars from the LAMOST Spectroscopic Surveys[J]. ASTROPHYSICAL JOURNAL LETTERS,2017,847(1). |
| APA | Huang, Y..,Liu, X. -W..,Zhang, H. -W..,Chen, B. -Q..,Xiang, M. -S..,...&Wang B.(2017).Discovery of Two New Hypervelocity Stars from the LAMOST Spectroscopic Surveys.ASTROPHYSICAL JOURNAL LETTERS,847(1). |
| MLA | Huang, Y.,et al."Discovery of Two New Hypervelocity Stars from the LAMOST Spectroscopic Surveys".ASTROPHYSICAL JOURNAL LETTERS 847.1(2017). |
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| Discovery of Two New（534KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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