大样本恒星演化研究组知识库

The multi-color photometric light curves for contact binary AV Puppis (AV Pup) in V RcIc 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 = m(2)/m(1) = 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 dP/dt = 4.83 x 10(-7) days yr(-1), which can be explained by mass transfer from the less massive component to the more massive one.