Abstract:
We have modeled the 'steady' part of sun's internal poloidal magnetic field in the form of a central dipole and a central hexapole with strengths (0.6 +/- 0.1)B(o)R(0) exp 3 and (0.16 +/- 0.05)B(o)R(0) exp 5 embedded in an asymptotically uniform field B(o). A small deviation from isorotation seems to indicate: (i) a slow buildup of toroidal field near the base of the convection zone and (ii) the presence of torsional MHD perturbations in the outer radiative core, with latitudinal structure and time scales which may be similar to those of solar activity.
