19 low mass hypervelocity star candidates from the first data release of the LAMOST survey
文献类型：期刊论文
| 作者 | Li, YB1; Luo, AL1; Zhao, G1; Lu, YJ1; Wei, P1,2; Du, B1; Li, X1 ; Zhao, YH1; Han ZW(韩占文)3; Wang B(王博)3
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2015-08 |
| 卷号 | 15期号:8页码:1364-1377 |
| ISSN号 | 1674-4527 |
| 关键词 | stars: low-mass stars: kinematics and dynamics Galaxy: abundances stars: fundamental parameters stars: distances |
| 通讯作者 | Li, YB (reprint author), Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China. |
| 产权排序 | 第三完成单位 |
| 英文摘要 | Hypervelocity stars are believed to be ejected out from the Galactic center through dynamical interactions between (binary) stars and the central supermassive black hole(s). In this paper, we report 19 low mass F/G/K type hypervelocity star candidates from over one million stars found in the first data release of the LAMOST regular survey. We determine the unbound probability for each candidate using a Monte-Carlo simulation by assuming a non-Gaussian proper-motion error distribution, and Gaussian heliocentric distance and radial velocity error distributions. The simulation results show that all the candidates have unbound possibilities over 50% as expected, and one of them may even exceed escape velocity with over 90% probability. In addition, we compare the metallicities of our candidates with the metallicity distribution functions of the Galactic bulge, disk, halo and globular clusters, and conclude that the Galactic bulge or disk is likely the birth place for our candidates. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | DIGITAL-SKY-SURVEY ; GALACTIC-CENTER ; PILOT SURVEY ; BLACK-HOLE ; SPECTROSCOPIC SURVEY ; STELLAR METALLICITY ; SEGUE G ; USNO-B ; HALO ; ORIGIN |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/1674-4527/15/8/018/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000360553400020 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4593]  |
| 专题 | 云南天文台_大样本恒星演化研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 2.State Key Laboratory of High-end Server & Storage Technology, Jinan 250510, China 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China 4.Nanjing Institute of Astronomical Optics & Technology, National Astronomical Observatories, Chinese Academy of Sciences, Nanjing 210042, China |
| 推荐引用方式 GB/T 7714 | Li, YB,Luo, AL,Zhao, G,et al. 19 low mass hypervelocity star candidates from the first data release of the LAMOST survey[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2015,15(8):1364-1377. |
| APA | Li, YB.,Luo, AL.,Zhao, G.,Lu, YJ.,Wei, P.,...&Yang, M.(2015).19 low mass hypervelocity star candidates from the first data release of the LAMOST survey.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,15(8),1364-1377. |
| MLA | Li, YB,et al."19 low mass hypervelocity star candidates from the first data release of the LAMOST survey".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 15.8(2015):1364-1377. |
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来源：云南天文台
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