Profiles of temperature, vertical velocity, and density as a function of height over the midplane. The letter labels correspond to those used in Fig. 3 and Figs. 8–10. At a height of up to above the planet, we find colliding streams (see also Fig. 10) that originate from overshooting the CPD after originally entering the Hill sphere through the midplane. The resulting compression leads to a slight density bump (f), which isthen accreted onto the planet and causes the vertical accretion shock (e).