In the left panel, the image shows the logarithmic density and the magnetic field lines for the final steady states reached for models NIP (left hand side; parallel configuration) and NIA (right hand side; anti-parallel configuration). In the right panel, the vertical velocity distribution and electric current contours are shown for the same models. Each panel displays side by side both hemispheres of the YSO system, described in Fig. 1, to compare the steady-states reached by the two models.