Left panel: radial shock velocity (v_s, violet) and axial position (black) for jet powers 10⁴⁶ (solid lines), 10⁴⁴ (dashed), and 10⁴² erg s⁻¹ (dotted). The thin, dark red lines indicate the ISM sound speed at the axial position. Right panel: post-shock temperatures for same jet powers as the left panel in the case of a medium density following Eq. (7) (black lines), i.e., a hot, diffuse ISM, and a medium with constant number density 10³ cm⁻³, i.e., cold clouds. Horizontal lines indicate hydrogen ionization temperatures in local thermodynamical equilibrium, 3500 K (solid), and collisional equilibrium, 1.58 × 10⁵ K (dashed). In these clouds, the sound speed is 3 km s⁻¹. The temperatures have been derived for ionized hydrogen in Eq. (10).