A Photometric Study of the Eclipsing Binary QT Ursae Majoris

Abstract

Presented are the first multiband light curves of the eclipsing binary QT Ursae Majoris. The light curves were analyzed using the Wilson-Devinney program to find the best-fit stellar model. Asymmetries in the light curves required spots to be included in the model. The solution results give a Roche Lobe fill-out of 13%, which is consistent with a W-type contact binary. New linear and quadratic ephemerides were computed using 31 times of minima, including 8 new ones from this study.