Initial planetesimal mass distribution. We show the initial distributions of the rings (solid coloured lines), the total distribution of all bodies (black), and Eq. (33) (dashed cyan lines). All distributions have been averaged over all low-mass runs. The standard deviation (shaded area) shows the spread of the initial planetesimal mass distribution from the random sampling. The high-mass runs follow the same IMF but with a higher total number of bodies (see also Fig. 8).