Evolution of the x-y distribution of the young stars (blue points, age< 200 Myr) and the intermediate-age stars (red circles, age 200–400 Myr) for the TI-fid model (left column) and the RP-fid model (right column). From top to bottom, the simulation time increase as indicated in the top-left corner of the panels on the right. The x-y distribution of the disk gas (density> 0.01 H/cc) is shown with gray shading. In the left column, a cross symbol marks the central position of the secondary galaxy that causes the tidal perturbation in the TI-fid model. In the right column, the ram pressure wind blows from right to left, along the x-axis.