Diagram of r_eff as a function of the total luminosity of the observed EOs (grey circles) and the modeled merger objects (stars) from Brüns et al. (2011). Merger objects on eccentric orbits between 20 and 60 kpc are plotted in dark grey. Objects with the same initial CC mass but different initial CC effective radii between 10 and 160 pc are connected by black lines. Merger objects on a circular orbit at 60 kpc and an initial effective radius of the CC of 160 pc are plotted as black stars connected by dotted lines.