Population B (blue circles), population A (blue squares), population C (orange circles), and population D (orange squares) systems. Final planet mass vs. final planet period. The dashed red line at M_p = 16 M_J represents the threshold that separates planets from brown dwarfs as discussed in Spiegel et al. (2011). We end up with brown dwarfs because some planets undergo collisional merge, and the resulting total planet mass is greater than 16 M_J. We note that some points are overlapping with each other, especially the ones relative to population D.