Comparison of velocity distributions from data and model for Auriga 23. The velocity distributions, υ_r, υ_ϕ, and υ_θ are calculated in 7 × 6 bins in r versus θ, but we only show three columns here as labelled. In each panel, the grey solid and dashed curves are the velocity distribution and uncertainty of observational data. The red solid curves are from the best-fitting model. Blue and magenta dashed curves show models with different radial distribution of the underlying DM mass. The velocity distributions, especially υ_r, strongly constrain the underlying DM radial density distribution. The best-fitting model (red solid) reproduces the velocity distributions in all three components well: υ_r, υ_ϕ, and υ_θ.