  We present Monte Carlo scattered light models of a warped disk that reproduce
the observed photopolarimetric variability of the classical T Tauri star AA
Tau. For a system inclination of 75 deg and using an analytic description for a
warped inner disk, we find that the shape and amplitude of the
photopolarimetric variability are reproduced with a warp which occults the
star, located at 0.07 au, amplitude 0.016 au, extending over radial and
azimuthal ranges 0.0084 au and 145 deg. We also show a time sequence of high
spatial resolution scattered light images, showing a dark shadow cast by the
warp sweeping round the disk. Using a modified smooth particle hydrodynamics
code, we find that a stellar dipole magnetic field of strength 5.2 kG, inclined
at 30 deg to the stellar rotation axis can reproduce the required disk warping
to explain AA Tau's photopolarimetric variability.
