Imaginary part of the gravitational Love number as a function of the excitation frequency of a Venus-like planet for different viscosity profiles. The multilayer reference profile Vreſ derived from Armann & Tackley (2012) is shown as the solid red line. The dotted and dash-dotted red lines represent the V0.1 and V100 profiles derived from the multilayer reference one presented in Fig. 4. In blue we present the imaginary Love number as a function of the excitation frequency computed with Eq. (12), (in absolute values) associated with the amplitude of the thermal tides presented in Fig. 6. The green curve represents the homogeneous profile described in Sect. 2.4. The vertical dotted black line represents the absolute value of the current frequency state of Venus.