Three new late-type hypervelocity star candidates from Gaia DR2 with refined selection criteria
文献类型：期刊论文
| 作者 | Li, Jiao6,7,8,10; Jia, Shi2,7; Gao, Yan6,7,8,10; Jiang, Deng-Kai6,7,10; Kupfer, Thomas3,4; Heber, Ulrich1,5; Liu, Chao9; Chen, Xue-Fei6,7,10; Han, Zhan-Wen6,7,8,10 |
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2020-03-01 |
| 卷号 | 20期号:3页码:15 |
| 关键词 | kinematics and dynamics evolution statistics |
| ISSN号 | 1674-4527 |
| DOI | 10.1088/1674-4527/20/3/42 |
| 英文摘要 | Several dozen hypervelocity star (HVS) candidates have been reported based on the second data release of Gaia (Gaia DR2). However, it has been proven that the radial velocities of some Gaia HVS candidates are not reliable. In this paper, we employ refined astrometric criteria to re-examine Gaia DR2, arriving at a more reliable sample of HVS and high velocity star candidates than those found by previous authors. We develop a method called Binary Escape Probability Analysis to identify some HVS candidates. This method allows us to work with stars having only two epochs of measured radial velocity. These stars were usually discarded in previous similar studies. A scrutiny of our final results sheds light on selection effects present in our studies, which we propose to be the focus of future studies. In total, we find three late-type (2 G-type and 1 K-type) HVS and 21 high velocity star candidates, 3 and 11 of which are new, respectively. Judging by their historical trajectories, which we calculate, all three HVS candidates could not have had Galactic center origins. Further monitoring is required to confirm their status. |
| WOS关键词 | WHITE-DWARFS ; KINEMATICS ; ORIGIN ; MASS ; VELOCITIES ; BINARIES |
| 资助项目 | Natural Natural Science Foundation of China (NSFC)[11521303] ; Natural Natural Science Foundation of China (NSFC)[11573061] ; Natural Natural Science Foundation of China (NSFC)[11733008] ; Natural Natural Science Foundation of China (NSFC)[11661161016] ; Yunnan province[2015FB190] ; Science and Technology Development Fund, Macau SAR[001/2016/AFJ] ; Science and Technology Development Fund, Macau SAR[0001/2019/A1] ; NSFC[11333003] ; NSFC[11390372] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000526826000001 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| 资助机构 | Natural Natural Science Foundation of China (NSFC) ; Natural Natural Science Foundation of China (NSFC) ; Yunnan province ; Yunnan province ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; NSFC ; NSFC ; Natural Natural Science Foundation of China (NSFC) ; Natural Natural Science Foundation of China (NSFC) ; Yunnan province ; Yunnan province ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; NSFC ; NSFC ; Natural Natural Science Foundation of China (NSFC) ; Natural Natural Science Foundation of China (NSFC) ; Yunnan province ; Yunnan province ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; NSFC ; NSFC ; Natural Natural Science Foundation of China (NSFC) ; Natural Natural Science Foundation of China (NSFC) ; Yunnan province ; Yunnan province ; Science and Technology Development Fund, Macau SAR ; Science and Technology Development Fund, Macau SAR ; NSFC ; NSFC |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/55816]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Li, Jiao |
| 作者单位 | 1.Univ Erlangen Nurnberg, ECAP, Erlangen, Germany 2.Macau Univ Sci & Technol, State Key Lab Lunar & Planetary Sci, Macau, Peoples R China 3.Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA 4.Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA 5.Univ Erlangen Nurnberg, Dr Remeis Sternwarte, Erlangen, Germany 6.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China 7.Chinese Acad Sci, Yunnan Observ, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Yunnan, Peoples R China 8.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 9.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100101, Peoples R China 10.Chinese Acad Sci, Ctr Astron Mega Sci, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Jiao,Jia, Shi,Gao, Yan,et al. Three new late-type hypervelocity star candidates from Gaia DR2 with refined selection criteria[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2020,20(3):15. |
| APA | Li, Jiao.,Jia, Shi.,Gao, Yan.,Jiang, Deng-Kai.,Kupfer, Thomas.,...&Han, Zhan-Wen.(2020).Three new late-type hypervelocity star candidates from Gaia DR2 with refined selection criteria.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,20(3),15. |
| MLA | Li, Jiao,et al."Three new late-type hypervelocity star candidates from Gaia DR2 with refined selection criteria".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 20.3(2020):15. |
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来源：国家天文台
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