Molecular megamasers after ten years

  • Willem A. Baan
4. Extragalactic Masers

DOI: 10.1007/3-540-56343-1_216

Part of the Lecture Notes in Physics book series (LNP, volume 412)
Cite this paper as:
Baan W.A. (1993) Molecular megamasers after ten years. In: Clegg A.W., Nedoluha G.E. (eds) Astrophysical Masers. Lecture Notes in Physics, vol 412. Springer, Berlin, Heidelberg


Megamaser activity for the molecules OH, CH, H2CO, and H2O is reviewed in terms of a consistent picture of exponential amplification of radio continuum by foreground molecular gas. The different characteristics of the various types of megamasers can all be related to the density and pumping conditions of the molecular gas. These conditions strongly depend on the evolutionary stage of the nuclear activity.


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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • Willem A. Baan
    • 1
  1. 1.Arecibo ObservatoryArecibo

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