Internal structure and angular momentum luminosities for a M_ZAMS = 2 M_⊙ star. Top left: Kippenhahn diagram. The brown hatched regions represent convective layers, and the dotted yellow region represents radiative layers. Stellar evolutionary phases (pre-MS to WD) are indicated. Top right and centre left: Angular momentum luminosities carried by stochastically and tidally excited gravity waves as a function of orbital period and stellar age. Center right and bottom left: Ratio of the angular momentum luminosity carried by tidally excited waves to the angular momentum luminosity carried by stochastically excited waves as a function of orbital period and stellar age for a 1 M_Jup (centre right) and a 1 M_⊙ (bottom left) companion. Bottom right: Critical mass as a function of orbital period and stellar age. The Roche limit is shown in purple, the critical period (4π/ω_c; see Eq. 2) in orange, and the period at which a planet orbits at the stellar radius in brown. Changes in the stellar evolutionary phase are indicated with ticks on the upper axis.