New multi-color photometric investigations of solar-like contact binary V680 Per  

作　　者：Jing-Jing Wang Jia-Jia He Song-Qing Zhao 

机构地区：[1]China University of Petroleum–Beijing at Karamay,Karamay 834000,China [2]Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China [3]Key Laboratory of the Structure and Evolution of Celestial Objects,Chinese Academy of Sciences,Kunming 650216,China

出　　处：《Research in Astronomy and Astrophysics》2020年第4期49-56,共8页天文和天体物理学研究（英文版）

基　　金：supported by the Joint Research Found(Nos.U1831109 and U1631108)in Astronomy under cooperative agreement between the National Natural Science Foundation of China(NSFC)and Chinese Academy of Sciences(CAS);the Science Foundation of China University of Petroleum-Beijing at Karamay(Nos.RCYJ 2016B-03-004 and 2016B-03-006);Key Laboratory for the Structure and Evolution ofCelestial Objects,Chinese Academy of Sciences(No.OP201708)。

摘　　要：High-precision CCD photometric observations of the contact binary V680 Per were obtained in2016.Its symmetric multi-color light curves were analyzed by using the Wilson–Devinney(2013)program.These photometric solutions suggest that V680 Per is an A-type W UMa contact binary with the mass ratio of q=0.693 and a fill-out factor of f=18.84%with a small temperature difference of 101 K.Based on all minimum times,the O-C curve was analyzed for the first time in this study.A cyclic oscillation(A3=0.00093 d,T3=4.92 yr)superimposed on a secular decrease(d P/dt=-8.16×10-8 d yr-1)was identified.The continuous decrease in period is possibly a result of mass transfer from the more massive component to the less massive one,or angular momentum loss due to a magnetic stellar wind.Because of this secular decrease,it is predicted that the degree of contact will become higher,and V680 Per will evolve into a deeper overcontact binary.

关 键 词：binaries:eclipsing stars:solar-type stars:individual(V680 Per) 

分 类 号：P153[天文地球—天文学]