marked peak slightly below 1000 km s−1. The dotted, blue line gives the relative velocities between the subhalo and the ICM within a halo-centric sphere of 50 h−1 kpc. The similarity of the two velocity distributions suggests that most of the subhaloes...
marked difference between high- and low-mass clusters. The RPEX galaxies in high-mass clusters are found at much larger dis- tances. This is a consequence of the fact that the ICM of such systems is much more extended and the velocity dispersion...