Oral Presentation

High-Resolution ALMA Magnetic Field Observations in W51

Author(s): Koch P.M. et al.

Presenter: Patrick Koch (ASIAA)

We present ALMA Band 6 (230 GHz) dust polarization observations towards the high-mass star forming regions W51 e2, e8, and North. With a resolution of 0.25” a wealth of new magnetic (B) field sub-structures are revealed. These include (1) B-field structures in satellite cores, (2) a possible new phenomenon of magnetic channeling that might offer an explanation for the low star-formation efficiency, and (3) generic B-field features between cores that indicate a drag of the less massive core to its next more massive neighbor. We argue that these small-scale 0.01-pc structures mostly result from a gravity-B-field competition with a minor role of turbulence.