Projection of gas density inside the simulation of sex156-3 passages at a time of 9.7–12.5 Gyr. The dwarf is currently located at a galactocentric radius of 149 kpc, extremely close to its apogalacticon. The plot is centred on the mean position of the stellar particles. The position of every 50th stellar particle is shown as a red point; the smoothing kernel is ignored for stellar particles for clarity. Here, gas that has been lowered in density by tidal stripping is able to be completely expelled by Type Ia supernovae – a process that begins as the dwarf approaches apogalacticon (panel 3) – forming a split tidal stream of gas.