Parameter distribution of the target planets. The letters “C”, “H”, “Q”, “T”, and “W” are short for “CoRoT-”, “HAT-P-”, “Qatar-”, “TrES-”, and “WASP-”, respectively. The colors indicate the equilibrium temperature of the planet. The marker size is linearly proportional to the atmospheric scale height relative to the planetary radius (H/R_p ∝ R_pT_eq/M_p), where H is the scale height, R_p is the planetary radius, M_p is the planetary mass, and T_eq is the equilibrium temperature. The adopted parameters are listed in Table 3. The dashed lines are the isogravity lines, where g_J indicate Jupiter’s gravity.