New observations of extra-disk molecular gas in interacting galaxy systems, including a two-component system in stephan's quintet

  title={New observations of extra-disk molecular gas in interacting galaxy systems, including a two-component system in stephan's quintet},
  author={B. J. K. Smith and Curtis Struck},
  journal={The Astronomical Journal},
We present new CO (1 - 0) observations of eleven extragalactic tails and bridges in nine interacting galaxy systems, almost doubling the number of such features with sensitive CO measurements. Eight of these eleven features were undetected in CO to very low CO/HI limits, with the most extreme case being the NGC 7714/5 bridge. This bridge contains luminous H II regions and has a very high HI column density (1.6 X 10^21 cm^-2 in the 55" CO beam), yet was undetected in CO to rms T(R)* = 2.4 mK… 

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