Results for case A (M = 4, η = 10^-2, ℒ_kin = 1.1 × 10⁴² erg s^-1) at t = 740 time units, 5.7 × 10⁷ yr. Left: cut in the (y,z) plane of the logarithmic density distribution in units of jet density. The spatial units are in jet radii (100 pc) and the image extends over 12 kpc in the jet direction and over 6 kpc in the transverse direction. Right: maximum pressure on a (x,z) plane at a given position y along the jet as a function of y. The pressure is plotted, from now on, in units of the ambient value (instead of the computational units ).