Upper panel: rest-frame LOS velocity vs. projected clustercentric distance for the galaxies of the ensemble cluster. Small red dots indicate red galaxies and blue triangles indicate blue galaxies. Black curves show the limits that are due to the escape velocity assuming a NFW mass profile (see text). Lower panel: velocity dispersion profiles (VDPs) for red and blue galaxies of the ensemble cluster (solid red circles and blue open triangles). Data are binned in intervals of 0.25 Mpc in the 0–2R₂₀₀ range. The point abscissae are set to the averages of the R/R₂₀₀ values of each sample within the bins. The error bars are determined by a bootstrap resampling procedure.