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Recent Results on Active Galactic Nuclei

Blandford, R. D. (1999) Recent Results on Active Galactic Nuclei. In: The Non-Sleeping Universe. Springer Netherlands , Dordrecht, pp. 245-252. ISBN 9789401059237.

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There is now little doubt that the nuclei of most galaxies contain massive black holes with 10⁶ M_⊙< M < 10¹⁰ M_⊙ and that these are ultimately responsible for most nuclear activity when they are supplied with gas. Parallel observations of Galactic X-ray sources are providing small scale counterparts that have similar properties except that they vary far more rapidly. As we can now determine the masses of these black holes in several instances, we can ask much more quantitative questions about the mode of accretion and the origin and collimation of outflows. In this contribution, I will emphasize the importance of magnetic field for extracting the angular momentum from the flow and explain how the radiative efficiency is controlled by the mass accretion rate and the actual properties of magnetized, plasma.

Item Type:Book Section
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Blandford, R. D.0000-0002-1854-5506
Additional Information:© 1998 Kluwer Academic Publishers. I thank Pedro Avelino, Teresa Lago and their colleagues for the invitation to attend this meeting and financial support. Support under NSF grant AST 95-29170 and NASA grants NAG5-2837, NAG5-7007 is gratefully noted.
Funding AgencyGrant Number
NSFAST 95-29170
Subject Keywords:Magnetic Field; Black Hole; Angular Momentum; Recent Result; Accretion Rate
Record Number:CaltechAUTHORS:20200508-160021917
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103086
Deposited By: George Porter
Deposited On:11 May 2020 14:45
Last Modified:16 Nov 2021 18:18

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