19 low mass hypervelocity star candidates from the first data release of the LAMOST survey

	19 low mass hypervelocity star candidates from the first data release of the LAMOST survey
	Li, Yin-Bi1 ; Luo, A-Li1 ; Zhao, Gang1 ; Lu, You-Jun1 ; Wei, Peng1,2 ; Du, Bing1 ; Li, Xiang1 ; Zhao, Yong-Heng1 ; Han, Zhan-Wen 3; Wang, Bo3
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2015-08-01
卷号	15 期号:8 页码:1364-1377
关键词	stars: low-mass stars: kinematics and dynamics Galaxy: abundances stars: fundamental parameters stars: distances
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.
收录类别	SCI
语种	英语
WOS记录号	WOS:000360553400020
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5608]
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.State Key Lab High End Server & Storage Technol, Jinan 250510, Peoples R China 3.Chinese Acad Sci, Yunnan Observ, Key Lab Struct & Evolut Celestial Objects, Kunming 650216, Peoples R China 4.Chinese Acad Sci, Nanjing Inst Astron Opt & Technol, Natl Astron Observ, Nanjing 210042, Peoples R China
推荐引用方式 GB/T 7714	Li, Yin-Bi,Luo, A-Li,Zhao, Gang,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, Yin-Bi.,Luo, A-Li.,Zhao, Gang.,Lu, You-Jun.,Wei, Peng.,...&Yang, Ming.(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, Yin-Bi,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.