| Binary Star Fractions from the LAMOST DR4 | |
| 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
 |
| 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 |
| DOI | 10.1088/1674-4527/18/5/52 |
| 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. |
| 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关键词 | STELLAR ATMOSPHERIC PARAMETERS ; SOLAR-TYPE STARS ; MULTIPLICITY ; SCIENCE |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| WOS记录号 | WOS:000432273900004 |
| 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 |
| 内容类型 | 期刊论文 |
| 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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