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X-Ray Characteristics of Water Megamaser Galaxies

Published online by Cambridge University Press:  16 July 2018

K. Leiter ,
M. Kadler ,
J. Wilms ,
J. Braatz ,
C. Grossberger ,
F. Krauß ,
A. Kreikenbohm ,
M. Langejahn ,
E. Litzinger  and
A. Markowitz
...Show all authors
K. Leiter
Affiliation:
Lehrstuhl für Astronomie, Universität Würzburg, Würzburg, Germany Dr. Karl Remeis Sternwarte & ECAP, Universität Erlangen-Nürnberg, Bamberg, Germany
M. Kadler
Affiliation:
Lehrstuhl für Astronomie, Universität Würzburg, Würzburg, Germany
J. Wilms
Affiliation:
Dr. Karl Remeis Sternwarte & ECAP, Universität Erlangen-Nürnberg, Bamberg, Germany
J. Braatz
Affiliation:
NRAO, Charlottesville, USA
C. Grossberger
Affiliation:
Dr. Karl Remeis Sternwarte & ECAP, Universität Erlangen-Nürnberg, Bamberg, Germany MPE, Garching, Germany
F. Krauß
Affiliation:
GRAPPA & API, University of Amsterdam, Netherlands
A. Kreikenbohm
Affiliation:
Lehrstuhl für Astronomie, Universität Würzburg, Würzburg, Germany Dr. Karl Remeis Sternwarte & ECAP, Universität Erlangen-Nürnberg, Bamberg, Germany
M. Langejahn
Affiliation:
Lehrstuhl für Astronomie, Universität Würzburg, Würzburg, Germany Dr. Karl Remeis Sternwarte & ECAP, Universität Erlangen-Nürnberg, Bamberg, Germany
E. Litzinger
Affiliation:
Lehrstuhl für Astronomie, Universität Würzburg, Würzburg, Germany Dr. Karl Remeis Sternwarte & ECAP, Universität Erlangen-Nürnberg, Bamberg, Germany
A. Markowitz
Affiliation:
University of California (UCSD/CASS), San Diego, USA NCAC, Warsaw, Poland
C. Müller
Affiliation:
IMAPP, Radboud University, Netherlands
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Abstract

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We have compiled the X-ray characteristic properties for a unique and homogeneous sample of Type 2 AGN with water megamaser activity observed by XMM-Newton and for a control sample of non-maser galaxies, both analyzed in a uniform way. A comparison of the luminosity distributions confirms previous results (from smaller and/or less systematic studies) that water maser galaxies appear more luminous than non-maser sources. In addition, the maser phenomenon is associated with more complex X-ray spectra, higher column densities and higher equivalent widths of the Fe Kα line. Both a sufficiently luminous X-ray source and a high absorbing column density in the line of sight favor the appearance of the water megamaser phenomenon in AGN.

Keywords

masers, galaxies: active, galaxies: Seyfert, X-rays: galaxiescosmological parameters

References

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