2010AJ....139.1106R

We report analysis of VRIJH photometry and phase-resolved optical spectroscopy of the eclipsing DA white dwarf (WD) plus dMe dwarf binary QS Vir. Modeling of the photometric data yields an inclination of i = 74.9±0.6 and a mass ratio of q = M₂/M₁= 0.50±0.05. Our Doppler maps indicate the presence of material in the Roche lobe of the WD, at a location near the M star, likely due to accretion from the stellar wind of the M star (as opposed to Roche-lobe overflow accretion). We also constructed images of the brightness distribution of the M star at different epochs which reveal the location of two stable active regions. Doppler tomography shows that the majority of the hydrogen and Ca II H&K emission originates on the active M dwarf, likely distributed in two preferred activity longitudes, similar to active regions on BY Dra and FK Comae systems.