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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)2,4; Liu, Chao2,3
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
2021-12
Volume21Issue:11
DOI10.1088/1674-4527/21/11/272
Contribution Rank第4完成单位
Indexed BySCI
Keywordbinaries: spectroscopic techniques: radial velocities stars: early-type
Abstract

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.

Funding ProjectNational 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
Funding OrganizationNational 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
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星天文学 ; 恒星形成与演化
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Publication Place20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
ISSN1674-4527
URL查看原文
WOS IDWOS:000735638300001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSPECTROSCOPIC SURVEY ; MULTIPLICITY ; EVOLUTION ; CATALOG
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ynao.ac.cn/handle/114a53/24755
Collection大样本恒星演化研究组
Corresponding AuthorLiu, Chao
Affiliation1.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China;
2.University of Chinese Academy of Sciences, Beijing 100049, China;
3.Key Lab of Space Astronomy and Technology, National Astronomical Observatories, Beijing 100101, China;
4.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
Recommended Citation
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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