Solutions of the full dispersion equation (Eq. (34)) for ε = 43, which corresponds to the first valid vertical mode (with h = 0.0064H₀) in a star with the rotation, radius, and surface gravity of the Sun and the temperature gradient of ϵ = 1/3. Red curves correspond to the inertia-gravity (upper) and Rossby (lower) waves with l = 1. The blue curve corresponds to the Rossby-gravity waves with l = 0. Wave frequency was normalised by the angular frequency of the star, Ω. The toroidal wavenumber, k, was normalised by the stellar radius, R.