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) code.The 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.
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） code.The 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.
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)
