Fig. 4
Contour plot of the toroidal field in Cartesian coordinates, in the region r = [10−115] rg and θ = 80°−90°. The black solid lines are lines of positive Bφ, while black dashed lines are used for negative Bφ. Bφ = 0 is shown with triple dotted-dashed white lines. The straight white line indicates the boundary between disc and corona.
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