Photometric and period analysis of contact binary V608 Cassiopeiae

The first complete VRcIc light curves of V608 Cas are presented and analyzed by using the 2010 version of the W-D code. The photometric results show that V608 Cas is a moderate mass-ratio (q=0.373±0.005), shallow contact (f=19.7±4.9%) binary. A cool spot is present on the massive component. The orbital period of V608 Cas may increase continuously according to the (O−C) diagram, with a rate of dP/dt=+6.49×10−7 days/year. The fundamental parameters of V608 Cas are estimated as: M1=0.95±0.15M⊙,M2=0.35±0.08M⊙,R1=0.78±0.12R⊙,R2=0.50±0.10R⊙,L1=0.563±0.112L⊙,L2=0.233±0.086L⊙, where the uncertainties mainly come from the uncertainty of the primary's effective temperature.