High-velocity OH in absorption : a new tracer of shocked gas in outflows ?

  title={High-velocity OH in absorption : a new tracer of shocked gas in outflows ?},
  author={Abraham Ruiz and Luis Felipe Rodr{\'i}guez and J. Cant{\'o} and Igor Felix Mirabel},
  journal={The Astrophysical Journal},
VLA observations of the 1667 MHz transition of OH and of the adjacent continuum toward the galactic star-forming regions NGC 2071 and S255 are reported. In NGC 2071 bipolar, high-velocity OH was mapped in absorption and its morphology compared with that of the CO and H 2 bipolar outflows previously detected in the region. The maxima of high-velocity OH absorption appear to correlate better with the maxima of the H 2 emission, and it is suggested that the OH may trace shocked gas 
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