Comparison between the simulated tidal tails in a simplified simulation and in an N-body simulation. Simplified simulation (blue contours) is used throughout this work. A collisional N-body simulation (orange contours) of the same cluster NGC 2516 shows the same shape of tidal tails in the spatial (left panel) and kinematic (right panel) parameter spaces. The distributions plotted in this figure are not convolved with observational uncertainties. Contours are log-spaced.