Projected phase space of galaxies in the MACS0329 field with the rest-frame velocity V_rf = (V − ⟨V⟩)/(1 + z) versus the projected cluster-centric distance R. Dots show the 533 galaxies selected in the velocity peak of the cluster according to the 1D-DEDICA method. Red dots indicate the 430 galaxies that are considered true cluster members according to the second step of the member selection. The BCG position is indicated by the box at R = 0. The blue curves contain the region where V_rf is smaller than the escape velocity (see text).