Mass loss per unit area as a function of the X-ray flux. The red dots come from Wood et al. (2005; W05) and the blue dots are from Jardine & Collier (2019; JC19). In green: measurements from the atmospheric evaporation of GJ 436b (Vidotto & Bourrier 2017, VB17). Gray dotted line: Wood et al. (2005) scaling law corresponding to w = 1.34. Red dashed line: Suzuki et al. (2013) scaling law corresponding to w = 0.82. The light gray region corresponds to the upper and lower bounds we considered to be consistent with ZDI statistical studies.