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Statistical Connections among Water Vapor Megamasers

Published online by Cambridge University Press:  14 August 2015

A. S. Wilson ,
J. A. Braatz  and
C. Henkel
A. S. Wilson
Affiliation:
Astronomy Department, University of Maryland College Park, MD 20742, U.S.A. and Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, U.S.A.
J. A. Braatz
Affiliation:
Center for Astrophysics, 60 Garden Street, MS 42, Cambridge, MA 02138, U.S.A.
C. Henkel
Affiliation:
Max-Planck-Institut fur Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany

Abstract

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We review correlations between water megamaser emission and other properties of AGN. Galaxies detected as water megamaser emitters tend to be nearer, brighter at mid-infrared and possibly centimeter wavelengths, and more highly inclined than undetected galaxies. Only Seyfert 2s and LINERs (no Seyfert Is) are detected. It is argued that the primary parameter determining whether an active galaxy is detectable as an H2O megamaser is the gas column along our line of sight to the nucleus.

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 11 , Issue 2: Highlights of Astronomy. As presented at the XXIIIrd General Assembly of the IAU (Part B), 1997 , 1998 , pp. 952 - 955
Copyright
Copyright © Kluwer 1998

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