Volume integrals of the various cooling processes of our model as functions of the impinging XUV flux. From top-left, moving clockwise, the four panels represent different planets with increasing φ_p, from : GJ 3470 b (log φ_p = 12.30), HD 149026 b (log φ_p = 12.84), WASP-80 b (log φ_p = 13.02) and WASP-77A b (log φ_p = 13.40). The various contributions have been calculated using the simulations presented in Sect. 2. The first two objects fall in the range of low gravity planets, the third one is an intermediate gravity planet, while the last one is a genuine high gravity planet. The advection contribution is not shown for WASP-77A b, since it is of the same order of magnitude the order of the numerical approximation of the code.