Panel a): evolution of the azimuthally averaged density profile shown in six epochs calculated at 0, 50, 150, 300, 450, and 600th binary orbits. The initial density profile is shown with black dotted curve. Panel b): evolution of the azimuthally averaged eccentricity shown in five curves calculated at 50, 150, 300, 450, and 600th binary orbits. Only the 0−20 AU region is shown in the plot, as the disk is significantly truncated beyond 20 AU. Panel c): evolution of the disk radius (with blue), and the averaged disk eccentricity (with black). The curves are smoothed to remove “noise” (see text for explanation). Panel d): variation in the disk eccentricity during a full disk precession period. The disk position angle (PA) is measured relative to the position of the orbiting secondary.