Stages in the evolution of SN ejecta interacting with circumstellar disk (model A). The columns show snapshots at times t = 0, 200, and 400 days. Each row shows different quantity, from top to bottom: density ρ, radial velocity u_r, polar velocity u_θ, temperature T, and shock heating rate . Bottom row: includes two contours of constant optical depth to electron scattering for two sight lines: θ = 0 (looking from the top, dashed white lines) and θ = π∕2 (looking from the right of the plot, solid white lines). Inner and outer lines correspond to optical depths of 2∕3 and 0.1, respectively. The + and − signs in the middle panel of the middle row illustrate the sign convention for polar velocity u_θ. To conserve the size of the files, the resolution of the bitmaps was reduced down from the resolution of our simulations. Animated version of this figure is available as the movie A.