Imaginary part of the harmonic of surface pressure oscillations (Pa) as a function of the normalized tidal frequency in linear (leftpanels) and logarithmic scales (for ω > 0). Top panels: spectra obtained with GCM numerical simulations for a fixed surface pressure, p_s = 10 bar, and various values of the star–planet distance: a = 0.3–0.9 au with a step Δa = 0.1 au. Bottom panels: spectra obtained for a fixed star planet–planet distance, a = a_Venus and various values of the surface pressure : p_s = 1, 3, 10, 30 bar. Numerical results are designated by points and interpolated with cubic splines. The reference case of the study (a = a_Venus and p_s = 10 bar) corresponds to the grey line in all plots.