Top panel: orbital evolution of a planet having a mass fixed at the maximal value allowed for Kepler-93b (M_in = 4.68 M_Earth), for different values of the initial orbital distance: a_in = 0.01, 0.02, 0.021, 0.022, 0.023, 0.024, 0.03, 0.04 and 0.053 AU. For initial orbital distances lower than ∼0.023 AU, the planet would be rapidly engulfed by the host star. The initial surface rotation rate considered in both panels is Ω_in = 18 × Ω_⊙. Bottom panel: orbital evolution of a planet located at the same orbital distance of Kepler-93b (initial value fixed at a_in = 0.053 AU), by considering different initial masses, the maximal value allowed for Kepler-93b (M_in = 4.68 M_⊕, solid black line) and M_in = 100, 317, 1000 M_⊕ (red solid lines). The magenta area represents the extension of the stellar convective envelope, while the cyan area represents the radiative core. The dotted black lines indicate the evolution of the corotation radii and the dotted red lines show the evolution of the minimum orbital distance for dynamical tides to be active.