Output of the simulations for model C. Upper panels, left: Model H I moment 0 map, the contour levels show the model stellar distribution at 10 × 10^0.5 × n (n = 0,1,2,..) M_⊙ pc⁻². Right: Model H I moment 1 map, the white contour levels are from −70 to 70 km s⁻¹ in steps of 10 km s⁻¹, the black contour the model stellar distribution at 10 M_⊙ pc⁻². The empty dot shows the kinematic centre. Lower left panel: Model H I contours on model Hα distribution. Lower right panel: Model H I contours on model FUV distribution. The H I contour levels on the Hα and the FUV images are N(HI) = 3.9×10¹⁹ × 10^0.5 × n (n = 0,1,2...) cm⁻².