Mass-weighted probability density function (PDF) of the log₁₀ of the density normalised by the radially averaged mid-plane density, for the snapshots shown in Figure 7. The grey dashed line depicts the Jeans density (see text for details), at which we expect numerical effects to dominate. The left panel shows all the runs at times similar to Figure 7, and the right panel shows the time evolution of the Q1_ℳ36 case leading up to the time in the left panel. We see that all the runs in the left panel form high-density tails that represent feathers and that the densest end of the tail is reaching the limit imposed by the resolution of our simulations.