Tangential (top panel) and vertical (bottom panel) velocity spectra predicted by the 2D IGW simulations from Rogers et al. (2013), for three scenarios for the radial rotation profile: no rotation; rigid rotation with a rotation frequency of 1.1 d⁻¹ (12.7 μHz); and non-rigid rotation (Ω_core/Ω_env = 1.5) with a surface rotational frequency of 0.275 d⁻¹ (8.7 μHz), which are shown in green, blue and red, respectively. We note that the amplitudes of these spectra have been normalised to the dominant peak in each spectrum and have arbitrary units. The vertical grey lines show the theoretical pulsation mode frequencies for (ℓ,m) = (1, 0) in a 3 M_⊙ ZAMS star for radial orders in the range n ∈ [−25, −1] calculated by GYRE (Townsend & Teitler 2013) and each rotation scenario.