Evolution of N_SG /N_TOT ratios, together with half-light radii (r_hl), for a set of MOCCA simulations. The figure consists of two series of MOCCA models: tidally filling (left, TF), and tidally underfilling (right, TuF). The main MOCCA initial parameters are summarized in the titles. In every plot there are 2–4 MOCCA models for which all initial parameters are the same, except one shown in the legend of each panel. In each panel, the left Y-axis shows the half-light radius (r_hl (pc)), and the right Y-axis the N_SG/N_TOT ratio. The figure shows models differing in N, initial number of stars. The other varying parameters are: r_g [kpc], galactocentric distance; fb, binary fraction; and M_max [M_⊙], maximum mass for the SG stars, and they are presented in an identical way in Figure A.1 in Appendix A.