A photometric solution of an A-type W UMa binary, GSC 0763-0572 is examined with a revised orbital period. The overcontact degree is found to be f = 40.66%, with a low mass ratio of q = 0.2554. The result demonstrates an unambiguous increase in the orbital period with a relative period change of ΔP\slashP=+5.69×10−7d yr−1. This indicates that GSC 0763-0572 is undergoing a process of mass transfer from the secondary component to the primary one with a rate of relative mass change of Δm1\slashm=+5.18×10−8 yr−1, for a conservative model of mass transfer. We find that GSC 0763-0572 might transform into a rapidly rotating star, if total spin angular momentum increases until it is greater than one-third of the orbital angular momentum, without breaking the contact configuration.
@article{arxiv.1204.0122,
title = {CCD Photometric Investigation of A W UMa-Type Binary GSC 0763-0572},
author = {W. Kriwattanawong and P. Pooseekheaw},
journal= {arXiv preprint arXiv:1204.0122},
year = {2015}
}