First Detection of Interaction between a Magnetic Disk Wind and an Episodic Jet in a Protostellar System

Rotating outflows from protostellar disks might trace extended magneto-hydrodynamic (MHD) disk winds (DWs), providing a solution to the angular momentum problem in accretion for star formation. In jet system HH 212, rotating outflow was detected SO around an episodic SiO. Here we spatially resolve this into three components: collimated aligned with SiO jet, wide-angle outflow, and evacuated cavity between created by large jet-driven bowshock. Although it theoretically predicted before, is first time that such jet-DW interaction directly observed resolved, crucial proper interpretation modeling of non-resolved DW candidates. The resolved kinematics brightness distribution both support be MHD dominating local extraction out 40 au, but inner launching radius truncated $\gtrsim 4$ au. Inside 4 where may not exist, magneto-rotational instability (MRI) transporting outwards. potentially present other similar systems, opens entirely new avenue probe large-scale magnetic field disks.