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Binary Star Fractions from the LAMOST DR4

文献类型：期刊论文

作者Tian, Zhi-Jia1; Liu, Xiao-Wei1,4; Yuan, Hai-Bo2; Chen, Bing-Qiu4; Xiang, Mao-Sheng2; Huang, Yang1,4; Wang, Chun1; Zhang, Hua-Wei1; Guo, Jin-Cheng1; Ren, Juan-Juan3
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2018-05-01
卷号18期号:5页码:12
关键词binaries: general binaries: spectroscopic Galaxy: Stella content stars: statistics surveys
ISSN号1674-4527
DOI10.1088/1674-4527/18/5/52
英文摘要Stellar systems composed of single, double, triple or higher-order systems are rightfully regarded as the fundamental building blocks of the Milky Way. Binary stars play an important role in formation and evolution of the Galaxy. Through comparing the radial velocity variations from multiepoch observations, we analyze the binary fraction of dwarf stars observed with LAMOST. Effects of different model assumptions, such as orbital period distributions on the estimate of binary fractions, are investigated. The results based on log-normal distribution of orbital periods reproduce the previous complete analyses better than the power-law distribution. We find that the binary fraction increases with T-eff and decreases with [Fe/H]. We first investigate the relation between alpha-elements and binary fraction in such a large sample as provided by LAMOST. The old stars with high [alpha/Le] dominate with a higher binary fraction than young stars with low [alpha/Fe]. At the same mass, earlier forming stars possess a higher binary fraction than newly forming ones, which may be related with evolution of the Galaxy.
WOS关键词STELLAR ATMOSPHERIC PARAMETERS ; SOLAR-TYPE STARS ; MULTIPLICITY ; SCIENCE
资助项目National Development and Reform Commission ; National Key Basic Research Program of China[2014CB845700] ; China Postdoctoral Science Foundation[2016M600850] ; National Natural Science Foundation of China[11443006] ; Joint Research Fund in Astronomy[U1531244] ; Joint Research Fund in Astronomy[U1631236]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000432273900004
出版者NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
资助机构National Development and Reform Commission ; National Development and Reform Commission ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Joint Research Fund in Astronomy ; Joint Research Fund in Astronomy ; National Development and Reform Commission ; National Development and Reform Commission ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Joint Research Fund in Astronomy ; Joint Research Fund in Astronomy ; National Development and Reform Commission ; National Development and Reform Commission ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Joint Research Fund in Astronomy ; Joint Research Fund in Astronomy ; National Development and Reform Commission ; National Development and Reform Commission ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Joint Research Fund in Astronomy ; Joint Research Fund in Astronomy
源URL[http://ir.bao.ac.cn/handle/114a11/21720]  
专题中国科学院国家天文台
通讯作者Tian, Zhi-Jia
作者单位1.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
2.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
4.Yunnan Univ, Dept Astron, Kunming 650091, Yunnan, Peoples R China
推荐引用方式
GB/T 7714		 Tian, Zhi-Jia,Liu, Xiao-Wei,Yuan, Hai-Bo,et al. Binary Star Fractions from the LAMOST DR4[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2018,18(5):12.
APA Tian, Zhi-Jia.,Liu, Xiao-Wei.,Yuan, Hai-Bo.,Chen, Bing-Qiu.,Xiang, Mao-Sheng.,...&Zhang, Jing-Hua.(2018).Binary Star Fractions from the LAMOST DR4.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,18(5),12.
MLA Tian, Zhi-Jia,et al."Binary Star Fractions from the LAMOST DR4".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 18.5(2018):12.

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