Evolution of hot outflowing gas: Hot outflowing gas is tracked forward from z ≃ 0.5 until it cools down. The two panels show the mass-weighted particle distribution according to their initial radius (r_init) and the radius at which they cool down (r_cooling) in the left panel, and according to their initial radial velocity (v_init) and the velocity at which they cool down (v_cooling) in the right panel. The two panels show the distribution of particles, weighted by their mass, according to their initial radius (x-axis), and the radius at which they cool down (y-axis).