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
one-dimensional Magneto-Hydrodynamics (MHD) picture. We show that central
magnetic fields of about 600-800 kG can displace the pure g-mode frequencies by
about 1%, as hinted by the helioseismic interpretation of GOLF observations.Comment: 6 pages, 4 figures; final version to appear in MNRA
