OH masers and bipolar molecular outflows associated with massive star formation

  • Douglas O. S. Wood
6. OH Masers in Star-Forming Regions
Part of the Lecture Notes in Physics book series (LNP, volume 412)


I present observations of the OH maser emission from G5.89−0.39 (W28A2), the most massive bipolar molecular outflow in the Galaxy. Together with recombination line and molecular line observations, these data suggest that a massive star is embedded in a dense disk of molecular gas. The star ionizes the inside of the disk and powers the bipolar outflow. OH masers form in the shocked regions just outside the ultra compact HII region. G5.89−0.39 represents an important link between the phenomena of low and high mass star formation as well as a chance to study the engine of a bipolar outflow in great detail.


Star Formation Massive Star Recombination Line Maser Emission Very Large Array 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Cesaroni, R., Walmsley, C. M., Kompe, C. and Churchwell, E., Astr. Ap. (Univ. Wisc. Preprint #401).Google Scholar
  2. Harvey, P. M and Forveille, T., 1988, Astr. Ap., 197, L19.Google Scholar
  3. Wood, D. O. S. and Churchwell, E., 1989, Ap. J. Suppl., 69, 831.Google Scholar
  4. Zijlstra, A. A. et al., 1989, Astr. Ap., 217, 157.Google Scholar
  5. Zijlstra, A. A., et al., M.N.R.A.S., 246, 217.Google Scholar

Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • Douglas O. S. Wood
    • 1
  1. 1.National Radio Astronomy ObservatorySocorro

Personalised recommendations