Fig. 11

Cartoon to visualize that the general directions of Bsp and Bver are coupled. The poloidal component (blue) of a dipolar a) and a quadrupolar b) field. In addition, we show the direction of the radial field component (black). We note that for the dipolar field the radial component above and below the mid-plane are oppositely directed. The directions of the vertical and spiral components of our model are thus coupled.
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