A photometric study of the high-mass-ratio contact binary AV Puppis

作     者：Quan-Wang Han Li-Fang Li Deng-Kai Jiang Quan-Wang Han;Li-Fang Li;Deng-Kai Jiang

作者机构：Yunnan ObservatoriesChinese Academy of SciencesKunming 650216China Key Laboratory of the Structure and Evolution of Celestial ObjectsChinese Academy of Sciences.Kunming 650216China University of 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：2019年第19卷第12期

页      面：217-222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：supported by the National Natural Science Foundation of China (Nos. 11773065, 11573061, 11573062, 11390374, 11733008 and 11661161016) the Yunnan Natural Science Foundation (Grant No. 2015FB190 and 2017HC018) 

主　　题：techniques:photometric stars:magnetic field stars:individual:AV Pupis 

摘      要：The multi-color photometric light curves for contact binary AV Puppis(AV Pup) in VRcIc bandpasses are presented and analyzed by using the 2013 version of the Wilson-Devinney(W-D) *** solutions suggest that AV Pup is a peculiar A-subtype W UMa contact binary with a high mass ratio(q = m2/m1 = 0.896) and a low fill-out factor(f = 10%). Combining our newly determined times of minimum with those collected from literatures, the orbital period changes of this system are investigated. The O-C analysis indicates that the orbital period of AV Pup is increasing at a rate of d P/dt = 4.83 × 10-7 days yr-1, which can be explained by mass transfer from the less massive component to the more massive one.