Colour maps of relative radiation temperature (top panel), relative density (second panel), and the radial velocity (third panel) and Γ (bottom panel), for several snapshots at different times (shown on top in 10³ seconds) at the beginning of our simulation for the O4 model. The figures are zoomed in to show the inner regions of our simulations. In the lateral direction, the figure extends to 0.2 R₀ and in the radial direction to 1.5 R₀, with R₀ as the lower boundary radius of our simulation.