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The Origin of High-velocity Stars from Gaia and LAMOST

文献类型：期刊论文

作者Du, Cuihua2; Li, Hefan3; Newberg, Heidi Jo4; Chen, Yuqin1,2; Shi, Jianrong1,2; Wu, Zhenyu1,2; Ma, Jun1,2
刊名ASTROPHYSICAL JOURNAL LETTERS
出版日期2018-12-20
卷号869期号:2页码:6
ISSN号2041-8205
关键词Galaxy: abundances Galaxy: center Galaxy: kinematics and dynamics
DOI10.3847/2041-8213/aaf578
英文摘要Based on the second Gaia data release and spectroscopy from the Large Sky Area Multi-object Fiber Spectroscopic Telescope (LAMOST) Data Release 5, we define the high-velocity (HiVel) stars sample as those stars with v(gc) > 0.85v(esc), and derived the final sample of 24 HiVel stars with stellar astrometric parameters and radial velocities. Most of the HiVel stars are metal poor and alpha-enhanced. In order to further explore the origin of these HiVel stars, we traced the backward orbits of each HiVel star in the Galactic potential to derive probability parameters that are used to classify these HiVel stars. Of these, 5 stars are from the tidal debris of disrupted dwarf galaxy, and 19 stars are runaway-star candidates originating from the stellar disk.
WOS关键词HYPERVELOCITY STARS ; BLACK-HOLE ; DISCOVERY
资助项目National Natural Science Foundation of China ; Chinese Academy of Science[U1231113] ; Institute and the University of the Chinese Academy of Sciences ; China Scholarship Council (CSC) ; National Natural Foundation of China (NSFC)[11625313] ; National Natural Foundation of China (NSFC)[11573035] ; NSF[AST 16-15688] ; Alfred P. Sloan Foundation ; National Science Foundation ; U.S. Department of Energy Office of Science ; National Development and Reform Commission
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000453856800001
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science ; Chinese Academy of Science ; Institute and the University of the Chinese Academy of Sciences ; Institute and the University of the Chinese Academy of Sciences ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; National Natural Foundation of China (NSFC) ; National Natural Foundation of China (NSFC) ; NSF ; NSF ; Alfred P. Sloan Foundation ; Alfred P. Sloan Foundation ; National Science Foundation ; National Science Foundation ; U.S. Department of Energy Office of Science ; U.S. Department of Energy Office of Science ; National Development and Reform Commission ; National Development and Reform Commission ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science ; Chinese Academy of Science ; Institute and the University of the Chinese Academy of Sciences ; Institute and the University of the Chinese Academy of Sciences ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; National Natural Foundation of China (NSFC) ; National Natural Foundation of China (NSFC) ; NSF ; NSF ; Alfred P. Sloan Foundation ; Alfred P. Sloan Foundation ; National Science Foundation ; National Science Foundation ; U.S. Department of Energy Office of Science ; U.S. Department of Energy Office of Science ; National Development and Reform Commission ; National Development and Reform Commission ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science ; Chinese Academy of Science ; Institute and the University of the Chinese Academy of Sciences ; Institute and the University of the Chinese Academy of Sciences ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; National Natural Foundation of China (NSFC) ; National Natural Foundation of China (NSFC) ; NSF ; NSF ; Alfred P. Sloan Foundation ; Alfred P. Sloan Foundation ; National Science Foundation ; National Science Foundation ; U.S. Department of Energy Office of Science ; U.S. Department of Energy Office of Science ; National Development and Reform Commission ; National Development and Reform Commission ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science ; Chinese Academy of Science ; Institute and the University of the Chinese Academy of Sciences ; Institute and the University of the Chinese Academy of Sciences ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; National Natural Foundation of China (NSFC) ; National Natural Foundation of China (NSFC) ; NSF ; NSF ; Alfred P. Sloan Foundation ; Alfred P. Sloan Foundation ; National Science Foundation ; National Science Foundation ; U.S. Department of Energy Office of Science ; U.S. Department of Energy Office of Science ; National Development and Reform Commission ; National Development and Reform Commission
源URL[http://ir.bao.ac.cn/handle/114a11/23882]  
专题中国科学院国家天文台
通讯作者Du, Cuihua
作者单位1.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Coll Astron & Space Sci, Beijing 100049, Peoples R China
3.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
4.Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA
推荐引用方式
GB/T 7714		 Du, Cuihua,Li, Hefan,Newberg, Heidi Jo,et al. The Origin of High-velocity Stars from Gaia and LAMOST[J]. ASTROPHYSICAL JOURNAL LETTERS,2018,869(2):6.
APA Du, Cuihua.,Li, Hefan.,Newberg, Heidi Jo.,Chen, Yuqin.,Shi, Jianrong.,...&Ma, Jun.(2018).The Origin of High-velocity Stars from Gaia and LAMOST.ASTROPHYSICAL JOURNAL LETTERS,869(2),6.
MLA Du, Cuihua,et al."The Origin of High-velocity Stars from Gaia and LAMOST".ASTROPHYSICAL JOURNAL LETTERS 869.2(2018):6.

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