Orbital period correction and light curve modeling of the W-subtype shallow contact binary OW Leo

作     者：Xiao Zhou Sheng-Bang Qian Xiao Zhou;Sheng-Bang Qian

作者机构：Yunnan ObservatoriesChinese Academy of Sciences(CAS)Kunming 650216China Key Laboratory of the Structure and Evolution of Celestial ObjectsChinese Academy of SciencesKunming 650216China Center for Astronomical Mega-ScienceChinese Academy of SciencesBeijing 100101China University of the Chinese Academy of SciencesBeijing 100049China 

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2期

页      面：24-30页

核心收录：

学科分类：07[理学] 070402[理学-天体测量与天体力学] 0704[理学-天文学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11703080,11703082 and 11873017) the Joint Research Fund in Astronomy(Grant No.U1931101)under cooperative agreement between the National Natural Science Foundation of China and Chinese Academy of Sciences the Yunnan Fundamental Research Projects(Grant No.2018FB006) 

主　　题：techniques photometric-binaries eclipsing-stars evolution 

摘      要：Orbital period and multi-color light curves’investigation of OW Leo are presented for the first *** orbital period of OW Leo is corrected from P=0.325545 days to P=0.32554052 days in our work,and the observational data from the All-Sky Automated Survey for Super Novae(ASAS-SN)are used to test the newly determined orbital ***,the phased light curves are calculated with the new period and the Wilson-Devinney program is applied to model the light curves,which reveal that OW Leo is a W-subtype shallow contact binary system(q=3.05,f=12.8%).The absolute physical parameters of the two component stars are estimated to be M_(1)=0.31(1)M_(⊙),M_(2)=0.95(3)M_(⊙),R_(1)=0.63(1)R⊙,R_(2)=1.04(1)R_(⊙),L_(1)=0.43(1)L_(⊙)and L_(2)=1.01(2)L_(⊙).The evolutionary status shows that the more massive star is less evolved than the less massive *** Leo has very low metal abundance,which means its formation and evolution are hardly influenced by any additional *** is formed from an initially detached binary system through nuclear evolution and angular momentum loss via magnetic braking,and has passed a very long time of main sequence evolution.