Figure courtesy Miesch, 2005
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"Fossil field" in radiative zone is a remnant of field lines trapped during solar formation.
Magnetic field of order 0.1 - 1 Gauss halts flow of convection.
Meridional flow set up in tachocline, halted at "tachopause".
Poloidal magnetic field can be maintained so long as radiative zone rotates rigidly.
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