Density of gas (image) and dark matter (contours) at 750 Myr intervals for NFW models from infall until around the first perigalacticon, beginning at infall in a 0.5 kpc slice through the centre of the dwarf. Only gas below 10⁶ K is shown. Each box is 15 kpc per side. The NISO model is shown in the left column, NRPS-50 in the middle column and NRPS-100 in the right column. The gas density is listed on the colour bar and the dark matter contours (from thick to light) are 10^6.5, 10⁶, and 10^5.5 M_⊙ kpc^-3.