Polarization observations of 1720 mhz oh masers toward the three supernova remnants w28, w44, and ic443

Jun, 1997
Published in:
  • Astrophys.J. 489 (1997) 143
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Abstract: (arXiv)
(abridged) - We present arcsecond resolution observations from the VLA of the satellite line of the hydroxyl molecule (OH) at 1720.53 MHz toward three Galactic supernova remnants: W28, W44 and IC443. All of our observations are consistent with a model in which the OH(1720 MHz) is collisionally excited by H2 molecules in the postshock gas heated by a non-dissociative shock. Supernova remnants with OH(1720 MHz) maser emission may be promising candidates to conduct high energy searches for the sites of cosmic ray acceleration.