中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 国家天文台
  3. 中国科学院国家天文台
The High-velocity Stars in the Local Stellar Halo from Gaia and LAMOST

文献类型：期刊论文

作者Du, Cuihua1,2; Li, Hefan3; Liu, Shuai4; Donlon, Tom2; Newberg, Heidi Jo2
刊名ASTROPHYSICAL JOURNAL
出版日期2018-08-10
卷号863期号:1页码:9
ISSN号0004-637X
关键词Galaxy: abundances Galaxy: formation Galaxy: halo Galaxy: kinematics and dynamics
DOI10.3847/1538-4357/aad088
英文摘要Based on the first Gaia data release and spectroscopy from the LAMOST Data Release 4, we study the kinematics and chemistry of the local halo stars. The halo stars are identified kinematically with a relative speed of at least 220 km s(-1) with respect to the local standard of rest. In total, 436 halo stars are identified. From this halo sample, 16 high-velocity (HiVel) stars are identified. We studied the metallicity and [alpha/Fe] distribution of these HiVel stars. Though most HiVel stars are metal-poor, there are several stars that have metallicities above -0.5 dex. To understand the origin of high-velocity stars, we evolve the trajectory of the star backward along the orbit in our adopted Galaxy potential model to determine the orbital parameters and assess whether the star could have originated in the Galactic center (GC). We found that some high-velocity stars could have originated from the GC, but other stars were probably kicked up from the Galactic disk.
WOS关键词NEWTON-TELESCOPE LIBRARY ; METAL-POOR STARS ; HYPERVELOCITY STARS ; BLACK-HOLE ; MILKY-WAY ; EMPIRICAL SPECTRA ; BETA PHOTOMETRY ; GALACTIC HALO ; DISK STARS ; GALAXY
资助项目National Natural Science Foundation of China[U1231113] ; Chinese Academy of Science[U1231113] ; Special Funds of Cooperation between the Institute and the University of the Chinese Academy of Sciences ; China Scholarship Council (CSC) ; 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:000441673600011
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science ; Chinese Academy of Science ; Special Funds of Cooperation between the Institute and the University of the Chinese Academy of Sciences ; Special Funds of Cooperation between the Institute and the University of the Chinese Academy of Sciences ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; 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 ; Special Funds of Cooperation between the Institute and the University of the Chinese Academy of Sciences ; Special Funds of Cooperation between the Institute and the University of the Chinese Academy of Sciences ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; 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 ; Special Funds of Cooperation between the Institute and the University of the Chinese Academy of Sciences ; Special Funds of Cooperation between the Institute and the University of the Chinese Academy of Sciences ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; 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 ; Special Funds of Cooperation between the Institute and the University of the Chinese Academy of Sciences ; Special Funds of Cooperation between the Institute and the University of the Chinese Academy of Sciences ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; 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/114a11/22274]  
专题中国科学院国家天文台
通讯作者Du, Cuihua
作者单位1.Univ Chinese Acad Sci, Coll Astron & Space Sci, Beijing 100049, Peoples R China
2.Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA
3.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式
GB/T 7714		 Du, Cuihua,Li, Hefan,Liu, Shuai,et al. The High-velocity Stars in the Local Stellar Halo from Gaia and LAMOST[J]. ASTROPHYSICAL JOURNAL,2018,863(1):9.
APA Du, Cuihua,Li, Hefan,Liu, Shuai,Donlon, Tom,&Newberg, Heidi Jo.(2018).The High-velocity Stars in the Local Stellar Halo from Gaia and LAMOST.ASTROPHYSICAL JOURNAL,863(1),9.
MLA Du, Cuihua,et al."The High-velocity Stars in the Local Stellar Halo from Gaia and LAMOST".ASTROPHYSICAL JOURNAL 863.1(2018):9.

入库方式： OAI收割

来源：国家天文台

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。