H I mean excess energy defined in Eq. (2) (panel a) as a function of planetary distance for different systems and Second power of the ratio between the excess and escape velocity defined in Eqs. (3) and (4) (panel b); r and R_RL are expressed in units of the planet radius, such that the planetary distance on the x axis is given as a fraction of the Roche lobe radius R_RL. The dashed line represents the threshold for wind launching, i.e., where (υ_xs/υ_esc)² = 1. In both panels, the diamond symbols indicate the location of the τ = 1 surface at 13.6 eV.