Radiative zone solar magnetic fields and g modes

We consider a generalized model of seismic-wave propagation that takes into account the effect of a central magnetic field in the Sun. We determine the g-mode spectrum in the perturbative magnetic field limit using a 1D magnetohydrodynamics picture. We show that central magnetic fields of about 600-800 kG can displace the pure g-mode frequencies by about 1 per cent, as hinted by the helioseismic interpretation of GOLF (Global Oscillations at Low Frequencies) observations.