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A Unified View of How the Study of Emission Lines Furthers Our Knowledge of AGN

Published online by Cambridge University Press:  12 April 2016

Julian H. Krolik
Julian H. Krolik*
Affiliation:
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA

Abstract

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A global view is given of how emission lines have been, and may in the future, be used to enhance our understanding of AGN. Lines from the microwave to the X-ray bands all contribute. Although we have a deep understanding of the physical processes by which line photons are generated, when the circumstances of line emission are complicated, models become too unreliable to provide strong inferences about the rest of the AGN system. At present, the lines which appear the most promising for helping answer the most important questions about AGN are the 22 GHz H2O rotational transition and the 6.4keV FeKα fluorescence.

Type
X. Unification of Active Galaxies and Other Global Issues
Information
International Astronomical Union Colloquium , Volume 159: Emission Lines in Active Galaxies: New Methods and Techniques , 1997 , pp. 459 - 474
Copyright
Copyright © Astronomical Society of the Pacific 1997

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