Scatter plot of stellar expansion rate, r_c⋆/r_c0⋆, versus the DM expansion rate, r_cDM/r_0DM, for the various types of isotropic velocity distributions analyzed in Figs. 4 and 5. The color code of the symbols and the labels are inherited from these two previous figures. The relationship is approximately a power law of exponent 0.85 (the solid red line). Two other exponents are shown for reference; in particular, 0.75 represents the scaling derived for circular orbits and given in Eq. (B.3).