Drift velocity compared to water snow line velocity (top panel) and drag regime (bottom panel) in an irradiated disk with photo-evaporation. All the bodies with sizes in the red area in the top panel cross the snowline, since they drift faster than it moves toward the central star. The snowline is determined using tabulated values for the temperature and pressure. After approximately 2.4 Myr, the snowline position starts to move away from the star, due to the disks dispersal. Thus, the ratio of the body’s drift speed to the snowline speed is negative and the log in the top panel is no longer defined and the ratio is set to a value of 12 to indicate that all the bodies will cross the snowline in that phase. In order to smooth out numerical artifacts, we applied a Gaussian filter in horizontal direction.