Example of pre- vs. post-merging stellar distributions. We show the profile for the simulation selected for Fig. 5 by reporting ρ_⋆ for the two progenitors with shades of purple and the post-merger galaxy in orange. The solid lines are the fit profile, which is exponential (Eq. (4)) and a sum of exponential for the progenitors and the post-merger galaxy, respectively. The vertical lines mark the half-mass radius for each galaxy.