Description
The Sun undergoes various oscillations through which we can probe deep into its convective interior. Inertial modes are low-frequency oscillations restored by the Coriolis force and have recently been observed on the Sun (Gizon et al., 2021). There have been several attempts to model the inertial modes employing several simplifying assumptions. In this work, we use Dedalus (Burns et al., 2020), a flexible spectral code, to compute the eigenmodes in the inertial frequency range. This framework helps us to examine the sensitivity of the modes to different model setups, including incompressible, anelastic, and fully compressible ones. Furthermore, we extend the linear model to include a free-surface boundary condition, the coupling with the radiative interior, and the effects of the magnetic field. In this talk, we shall present two main findings: the assumption of incompressibility is unjustified, and the inertial modes weakly couple with the radiative interior.
