RP distribution in phase-space around cluster halos from TNG at z = 0. The ram pressure in left panel is measured using the simplified procedure as adopted for GAEA, while the ram pressure in the middle panel is derived from gas cells. The right panel shows the distribution of ram pressure derived directly from gas cells and using the simplified procedure (solid and dotted histograms, respectively). Different colors correspond to different cluster-centric distances, as indicated in the legend.