Fig. 8.
Radial magnetic field at the surface as a function of time from the diffusion-dominated case with delay (D-DIFF) for 
({\it top panel}) and 
(bottom panel). The respective parameters are indicated above the plot. Contours represent the 25% and 10% levels of 
in the short-τeff case (top panel), and the 25% level in the long-τeff case (bottom panel).
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