This implies that magnetic fields are present in these systems at distances of tens of AU from the central stars.
Significant resolution is seen.
A model has been developed which involves asymmetric illumination of a dust shell around the star. The wind from the primary is seen in thermal free-free emission, whereas a second radio condensation is likely to be related to a collision with the wind from a secondary. Non-thermal radiation is produced at the point where the winds collide. A detailed model of this system has been made and published.