Evolution of the hotspot pressure p_h(t) (orange), cocoon pressure p_c(t) (blue), ambient pressure at the position of the hotspot, p_ah(t) (red), and of the cocoon midpoint, p_ac(t) (green). We represent them for different jet’s powers L₀: 10³⁹ W (solid curves), 10³⁷ W (dashed curves) and 10³⁵ W (dotted curves). The points indicate cocoon pressures obtained from numerical simulations, and are classified as explained in the caption of Fig. 2.