Results of the SPH simulations showing density profiles of isothermal disks influenced by the assumed binary companion in a circular orbit with P = 182.83 days, and different mass ratios, as indicated. Left: simulations for viscosity parameter α = 0.1. Right: simulations for α = 1. What is plotted is the azimuthally averaged surface density after 30 orbital periods. The truncation occurs where the density slope changes to a much steeper slope.