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MegaMasers and gigaMasers: A close look at Active Nuclei

Published online by Cambridge University Press:  26 January 2006

L.I. Gurvits ,
S. Frey ,
S. Rawlings  and
W. A. Baan
W. A. Baan*
Affiliation:
ASTRON, Westerbork Observatory, PO Box 2, 7990 AA Dwingeloo, The Netherlands
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Abstract

Molecular emissions are powerful tracers of intense heating and star-formation processes. In this paper we consider the characteristics of Megamaser emission that originate in some active nuclei that are powered by intense star-formation or accretion onto a massive compact object. The OH and possibly the H2CO Megamaser activity occurs among the most luminous sources in the population of (Ultra-) Luminous Infrared Galaxies. In addition, we consider the systematic behaviour of the line emission of high-density tracer molecules. An evolutionary scenario is presented for ULIRGs that may explain the molecular line ratios observed in the population of FIR galaxies.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 15: Radio Astronomy from Karl Jansky to Microjansky – JENAM'03 , 2005 , pp. 317 - 330
Copyright
© EAS, EDP Sciences, 2005

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