Dependence of the ratio of the Lorentz forcing relative to the hydrodynamic forcing with respect to the mass of the host star for the selected star-planet systems (see Table B.1). The magnetic forcing term f_mag is estimated with the magnetostrophic balance at the base and the top of the CZ and a stellar model evolved with a slow initial rotation. The tidal frequency has been calculated with the pair (m, n) that minimises and thus maximises f_mag/f_hydro.