Model A: detailed color maps of the density (upper panel) and the radial velocity (lower panel) structure, up to the distance 50 R_⋆ at time t ≈ 165 h since shock emergence. Contours denote the densities ρ = 10⁻⁷, 10⁻⁶, and 10⁻⁵ kg m⁻³ and the velocities 2500 and 3000 km s⁻¹. The resolution of the simulation is 2400∕480 grid cells in the radial/azimuthal direction within the quadrant.