2D histogram binning all the cells in run NIMHD at t ≈ 0.3 yr (where t = 0 corresponds to the epoch of protostellar birth), which shows the distribution of azimuthal velocities divided by $\sqrt{|g_{\mathrm{r}}|r}$ with respect to radius. The color-coding in the histograms represents the co-latitude θ divided by π, where θ/π = 0.5 corresponds to the equator and θ/π = 1 (respectively 0) corresponds to the south (respectively north) pole.