Comparison of the eigenmodes of the different classes of inertial modes (see Table 1) computed using compressible, anelastic, and Boussinesq models under uniform rotation. Note that the unstable high-latitude inertial modes are absent under solid body rotation. Here, we plot the real part of u_θ and the imaginary part of u_ϕ of the computed eigenmodes. The longitudes corresponding to the real and imaginary phases of the eigenfunctions are ϕ = ϕ₀ and ϕ = ϕ₀ − π/2m, respectively, where ϕ₀ is a longitude, where u_θ attains its maximum. The corresponding frequencies measured in the Carrington frame are stated below each eigenmode. The imaginary parts of the frequencies indicate the growth rates of the modes. All eigenfunctions are normalized such that the maximum of u_θ is 1 m/s at the surface.