Effect of the latitudinal resolution on the mode n = 66 (s ∼ 16.4) of the series (ℓ = 1, m = −1). Upper panel: Projections of the mean latitudinal profile in the radiative zone of this mode at different latitudinal resolution n_θ on the associated Legendre polynomials for a rotation rate Ω = 0.4Ω_K. Here, ${\mathrm{\Omega }}_{\mathrm{K}}=\sqrt{GM/R^3}$ is the critical rotation rate of the star and M and R are its mass and radius, respectively. Lower panel: Evolution of the relative frequency of the same mode as a function of ℓ_max. The reference frequency ω_ref corresponds to the frequency obtained using the highest latitudinal resolution (n_θ = 12). The model used is 1z.