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Physical Processes in Active Galactic Nuclei

Blandford, R. D. (1990) Physical Processes in Active Galactic Nuclei. In: Active Galactic Nuclei. Saas-Fee Advanced Courses. No.20. Springer , Berlin, pp. 161-275. ISBN 978-3-540-53285-9.

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Active Galactic Nuclei (henceforth AGN) have been observed assiduously, throughout the electromagnetic spectrum over the past 30 years and we know much about their collective and individual properties. Unfortunately, we are still a long way from being sure how they work. My primary intention, in the lectures that follow, is to explain some of the most important mechanisms that are believed to operate in these objects to an audience with a graduate physics and general astronomical background, but little prior exposure to AGN. In this way, I hope to provide a "toolkit" useful for understanding the abundance of models that have already been proposed to interpret the observations that will be reviewed more systematically here by Drs. Netzer and Woltjer. I shall make no attempt to summarize the phenomenology of AGN; neither will I give a critique of the models, although some personal preferences will clearly emerge, especially in the final lecture in which I outline one possible unified interpretation of AGN. I shall, however, draw upon both observations and models selectively to illustrate these physical processes. In the interests of brevity, I can only give heuristic derivations of most of the physical processes that I shall discuss. However, when possible, I will give more accurate formulae and references to their derivation.

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Blandford, R. D.0000-0002-1854-5506
Additional Information:© 1990 Springer-Verlag Berlin Heidelberg. I thank Thierry Courvoisier for his efficient organisation of this school and much helpful guidance on the content of these lectures, Hagai Netzer and Lodewijk Woltjer for their wise and entertaining instruction and several students for their attempts to make the above intelligible. Financial support under NASA grant NAGW1301 is gratefully acknowledged.
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Subject Keywords:Black Hole; Brightness Temperature; Radio Source; Accretion Disk; Active Galactic Nucleus
Series Name:Saas-Fee Advanced Courses
Issue or Number:20
Record Number:CaltechAUTHORS:20190605-110817771
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96146
Deposited By: Tony Diaz
Deposited On:06 Jun 2019 03:49
Last Modified:16 Nov 2021 17:18

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