From top to bottom: radial profiles of the magnetic field strength B, density ρ, pressure P, speed v (− v indicates a velocity in the opposite direction), and Mach number at three different times: 1000 yr (solid line), 3000 yr (dotted line), and 5000 yr (dashed line). The profiles shown are for the L₀ = 10³⁸ erg s^-1, τ = 3000 yr and ρ_ism = 10^-24 gcm^-3 scenario. Note that B has again been normalised to unity at the inner boundary.