Specific torque Γ(r) as a function of the radial separation from the planet for various planetary masses (as in Fig. 11). The predominantly positive branch of the curves corresponds to the inner one-sided torque (arising from the interval 0.65 r_p < r < 1 r_p) and the negative branch is the outer one-sided torque (arising from the interval 1 r_p < r< 1.35 r_p). The aim of the figure is to assess the inner-outer asymmetry of the one-sided torques and Γ(r) is therefore artificially normalized to the maximum value of the inner peak. The figure reveals how gap irradiation reduces the outer Lindblad torque with respect to the inner one.