2001AJ....121..482H

We have obtained time-series infrared photometry for the highly magnetic cataclysmic variable AR UMa. Our J- and K-band observations occurred during a low state, and they show a distinctive double-humped structure. Using detailed models for the expected ellipsoidal variations in the infrared caused by the nonspherical secondary star, we find that the most likely value for the system inclination is 70°. We also model low-state V-band photometry and find that its observed double-humped structure is caused not by ellipsoidal variations, to which it has been ascribed, but by beamed cyclotron radiation. We use this result to estimate the magnetic field strength of the active southern accretion region (B≲190 MG) and its magnetic longitude (ψ_S∼330°).