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
A New Hyper-runaway Star Discovered from LAMOST and Gaia: Ejected Almost in the Galactic Rotation Direction

文献类型：期刊论文

作者Li, Yin-Bi1; Luo, A-Li1; Zhao, Gang1; Lu, You-Jun1; Zhang, Xue-Sen2; Zhang, Fu-Peng3; Du, Bing1; Zuo, Fang1; Zhang, Lan1; Huang, Yang4
刊名ASTRONOMICAL JOURNAL
出版日期2018-09-01
卷号156期号:3页码:7
关键词Galaxy: center Galaxy: halo Galaxy: kinematics and dynamics stars: early-type
ISSN号0004-6256
DOI10.3847/1538-3881/aad09a
英文摘要In this paper, we report the discovery of a new late-B-type unbound hyper-runaway star (LAMOST-HVS4) from the LAMOST spectroscopic surveys. According to its atmospheric parameters, it is either a B-type main-sequence (MS) star or a blue horizontal branch (BHB) star. Its Galactocentric distance and velocity are 30.3 +/- 1.6 kpc and 586 +/- 7 km s(-1) if it is an MS star, and they are 13.2 +/- 3.7 kpc and 590 +/- 7 km s(-1) if a BHB star. We track its trajectories back and find that the trajectories intersect with the Galactic disk, and the Galactic center lies outside of the intersection region at the 3a confidence level. We investigate a number of mechanisms that could be responsible for the ejection of the star and find that it is probably ejected from the Galactic disk by supernova explosion or multiple-body interactions in dense young stellar clusters.
WOS关键词HORIZONTAL-BRANCH STARS ; SKY SURVEY 2MASS ; 1ST DATA RELEASE ; HYPERVELOCITY STARS ; BLACK-HOLE ; LOCAL STANDARD ; O-STAR ; MASS ; ORIGIN ; HALO
资助项目National Basic Research Program of China (973 Program)[2014CB845700] ; National Natural Science Foundation of China[11390371/2/4] ; National Science Foundation of China (NSFC)[11773033] ; Astronomical Big Data Joint Research Center ; Alibaba Cloud ; National Development and Reform Commission
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000441303000004
出版者IOP PUBLISHING LTD
资助机构National Basic Research Program of China (973 Program) ; National Basic Research Program of China (973 Program) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; Alibaba Cloud ; Alibaba Cloud ; National Development and Reform Commission ; National Development and Reform Commission ; National Basic Research Program of China (973 Program) ; National Basic Research Program of China (973 Program) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; Alibaba Cloud ; Alibaba Cloud ; National Development and Reform Commission ; National Development and Reform Commission ; National Basic Research Program of China (973 Program) ; National Basic Research Program of China (973 Program) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; Alibaba Cloud ; Alibaba Cloud ; National Development and Reform Commission ; National Development and Reform Commission ; National Basic Research Program of China (973 Program) ; National Basic Research Program of China (973 Program) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; Alibaba Cloud ; Alibaba Cloud ; National Development and Reform Commission ; National Development and Reform Commission
源URL[http://ir.bao.ac.cn/handle/114a11/22262]  
专题中国科学院国家天文台
通讯作者Li, Yin-Bi
作者单位1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100101, Peoples R China
2.ExtantFuture Beijing Technol Co Ltd, Beijing 100102, Peoples R China
3.Sun Yat Sen Univ, Sch Phys & Astron, Guangzhou 510275, Guangdong, Peoples R China
4.Yunnan Univ, South Western Inst Astron Res, Kunming 650500, Yunnan, Peoples R China
5.Chinese Acad Sci, Yunnan Observ, Key Lab Struct & Evolut Celestial Objects, Kunming 650216, Yunnan, Peoples R China
推荐引用方式
GB/T 7714		 Li, Yin-Bi,Luo, A-Li,Zhao, Gang,et al. A New Hyper-runaway Star Discovered from LAMOST and Gaia: Ejected Almost in the Galactic Rotation Direction[J]. ASTRONOMICAL JOURNAL,2018,156(3):7.
APA Li, Yin-Bi.,Luo, A-Li.,Zhao, Gang.,Lu, You-Jun.,Zhang, Xue-Sen.,...&Han, Zhan-Wen.(2018).A New Hyper-runaway Star Discovered from LAMOST and Gaia: Ejected Almost in the Galactic Rotation Direction.ASTRONOMICAL JOURNAL,156(3),7.
MLA Li, Yin-Bi,et al."A New Hyper-runaway Star Discovered from LAMOST and Gaia: Ejected Almost in the Galactic Rotation Direction".ASTRONOMICAL JOURNAL 156.3(2018):7.

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。