Binary fraction of O and B-type stars from LAMOST data

作     者：Feng Luo Yong-Heng Zhao Jiao Li Yan-Jun Guo Chao Liu Feng Luo;Yong-Heng Zhao;Jiao Li;Yan-Jun Guo;Chao Liu

作者机构：National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China University of Chinese Academy of SciencesBeijing 100049China Key Lab of Space Astronomy and TechnologyNational Astronomical ObservatoriesBeijing 100101China Yunnan ObservatoriesChinese Academy of SciencesKunming 650011China 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2021年第21卷第11期

页      面：19-27页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：the National Key R&D Program of China(No.2019 YFA0405501) supported by the National Natural Science Foundation of China(Grant Nos.11835057,12090040 and 12090043) Guo Shou Jing Telescope(the Large Sky Area Multi-Object Fiber Spectroscopic Telescope LAMOST)is a National Major Scientific Project built by the Chinese Academy of Sciences.Funding for the project has been provided by the National Development and Reform Commission 

主　　题：binaries:spectroscopic techniques:radial velocities stars:early-type 

摘      要：Abstract:Binary stars play an important role in the evolution of stellar *** intrinsic binary fraction(fbin)of O and B-type(OB)stars in LAMOST DR5 was investigated in this *** employed a cross-correlation approach to estimate relative radial velocities for each of the stellar *** algorithm described by Sana et al.(2013)was implemented and several simulations were made to assess the performance of the *** binary fraction of the OB stars is estimated through comparing the unidistribution between observations and simulations with the Kolmogorov-Smirnov *** show that it is reliable for stars most of whom have six,seven and eight repeated *** uncertainty of orbital parameters of binarity becomes larger when observational frequencies *** adopting the fixed power exponents ofπ=-0.45 andκ=-1 for period and mass ratio distributions,respectively,we obtain that fbin=0.4-0.06+0.05 for the samples with more than three *** we consider the full samples with at least two observations,the binary fraction turns out to be 0.37-0.03+*** two results are consistent with each other in 1σ.