Models of the root-mean-square velocity dispersion profiles emerging from our MCMC analysis in RG (solid lines). Upper panels: the green, blue, and red solid lines show the model profiles for the stars, blue GCs, and red GCs, respectively. Lower panels: zoom-in of the stellar profiles. The solid circles with error bars are the measured profiles from Fig. 3. The green, blue, and red dashed lines show the kinematic profiles of the stars, blue GCs, and red GCs computed with Eq. (23) where the values of the mass-to-light ratio Υ and the velocity anisotropy parameters β are those of the RG model but the gravitational field is Newtonian with no dark matter. The discrepancy with the RG curves highlights the gravitational boosting generated by the RG gravitational permittivity.