Average radial velocity profiles and dynamical radii. Solid curves show the average galaxy radial velocity profiles of clusters at three redshifts: z = 0.01, 0.62, and 1.04, from left to right, respectively. Dashed curves show the Savitzky–Golay (Savitzky & Golay 1964) smoothed profiles. Shaded bands show the error in the smoothed profiles. In each panel, the red, blue, and orange lines show the turnaround, the minimum radial velocity, and the inflection point radii, respectively, derived from the average radial velocity profiles (see Sect. 3).