DW UMa and the Irradiation Modulated Mass Transfer Model for Superhumps

Abstract

The light curves of the permanent superhumper DW UMa are analyzed in order to determine the amplitudes of its superhumps, $A_{SH}$, and the amplitudes of the periodic light variations with the beat period -- the {\it irradiation amplitudes}, $A_{irr}$. The resulting values of $A_{SH}$ and $A_{irr}$, together with other values from the literature, turn out to be correlated thereby confirming the irradiation modulated mass transfer model for superhumps.