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Theory and extragalactic masers

Published online by Cambridge University Press:  03 August 2017

William D. Watson
William D. Watson*
Affiliation:
Department of Physics, University of Illinois, Urbana, IL 61801-3080

Abstract

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Theoretical research on extragalactic masers (and hence this review) is almost entirely directed toward 22 GHz water masers in circumnuclear disks with the focus being the near ideal masing disk at the nucleus of the galaxy NGC4258. The discussion here is organized around (1) the excitation and conditions for the masers, (2) the spatial and spectral appearance of the maser emission, and (3) the mass accretion rate and structure of the disk. In addition, a summary is given of the basic physics (spectral linebreadths and maser polarization) that underlies certain interpretations of these and other astrophysical masers.

Type
Part 7. Maser Theory
Information
Symposium - International Astronomical Union , Volume 206: Cosmic Masers: From Protostars to Blackholes , 2002 , pp. 464 - 478
Copyright
Copyright © Astronomical Society of the Pacific 2002 

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