GTC/CanariCam Mid-infrared Polarimetry of Magnetic Fields in Star-forming Region W51 IRS2

We present 0.4 arcsec-resolution imaging polarimetry at 8.7, 10.3, and 12.5 microns, obtained with CanariCam the Gran Telescopio Canarias, of central region W51 IRS2. The polarization, as high 14 percent, arises from silicate particles aligned by interstellar magnetic field. separate, or unfold, polarization each sightline into emission absorption components, which we infer morphologies corresponding projected fields that thread emitting foreground-absorbing regions. conclude field in foreground material is part larger-scale ambient morphology mid-IR spanning cometary HII IRS2W similar to absorbing region. Elsewhere, two differ significantly no clear relationship between them. across core appears be an integral a champagne outflow gas originating dominating energetics there. bipolar outflow, W51north jet, originate near SMA1/N1 coincides almost exactly clearly demarcated north-south swath lower polarization. While speculative, comparison submm on different scales may support picture plays major role structure