Binary fraction of O and B-type stars from LAMOST data | |
Luo, Feng1,2; Zhao, Yong-Heng1,2; Li, Jiao1,2; Guo YJ(郭彦君)1,3; Liu, Chao1,4 | |
刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS |
2021-12 | |
卷号 | 21期号:11 |
关键词 | binaries: spectroscopic techniques: radial velocities stars: early-type |
ISSN号 | 1674-4527 |
DOI | 10.1088/1674-4527/21/11/272 |
产权排序 | 第4完成单位 |
文献子类 | Article |
英文摘要 | Binary stars play an important role in the evolution of stellar populations . The intrinsic binary fraction (f (bin)) of O and B-type (OB) stars in LAMOST DR5 was investigated in this work. We employed a cross-correlation approach to estimate relative radial velocities for each of the stellar spectra. The algorithm described by Sana et al. (2013) was implemented and several simulations were made to assess the performance of the approach. The binary fraction of the OB stars is estimated through comparing the uni-distribution between observations and simulations with the Kolmogorov-Smirnov tests. Simulations show that it is reliable for stars most of whom have six, seven and eight repeated observations. The uncertainty of orbital parameters of binarity becomes larger when observational frequencies decrease. By adopting the fixed power exponents of pi = -0.45 and kappa = -1 for period and mass ratio distributions, respectively, we obtain that f(bin)=0.4(-0.06)(+0.05) for the samples with more than three observations. When we consider the full samples with at least two observations, the binary fraction turns out to be 0.37(-0.03)(+0.03). These two results are consistent with each other in 1 sigma. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星天文学 ; 恒星形成与演化 |
URL标识 | 查看原文 |
出版地 | 20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA |
资助项目 | National Key R&D Program of China[2019 YFA0405501] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11835057] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[12090040] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[12090043] ; National Development and Reform Commission ; Ministry of Finance |
WOS关键词 | SPECTROSCOPIC SURVEY ; MULTIPLICITY ; EVOLUTION ; CATALOG |
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:000735638300001 |
资助机构 | National Key R&D Program of China[2019 YFA0405501] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11835057, 12090040, 12090043] ; National Development and Reform Commission ; Ministry of Finance |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24755] |
专题 | 云南天文台_大样本恒星演化研究组 |
通讯作者 | Liu, Chao |
作者单位 | 1.University of Chinese Academy of Sciences, Beijing 100049, China; 2.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China; 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China 4.Key Lab of Space Astronomy and Technology, National Astronomical Observatories, Beijing 100101, China; |
推荐引用方式 GB/T 7714 | Luo, Feng,Zhao, Yong-Heng,Li, Jiao,et al. Binary fraction of O and B-type stars from LAMOST data[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2021,21(11). |
APA | Luo, Feng,Zhao, Yong-Heng,Li, Jiao,Guo YJ,&Liu, Chao.(2021).Binary fraction of O and B-type stars from LAMOST data.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,21(11). |
MLA | Luo, Feng,et al."Binary fraction of O and B-type stars from LAMOST data".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 21.11(2021). |
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