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Recent Results on Active Galactic Nuclei

Blandford, R. D. (1998) Recent Results on Active Galactic Nuclei. Astrophysics and Space Science, 261 (1-4). pp. 245-252. ISSN 0004-640X. https://resolver.caltech.edu/CaltechAUTHORS:20190605-144045024

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Abstract

There is now little doubt that the nuclei of most galaxies contain massive black holes with 10^6 M_⊙< M < 10^(10) 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:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1023/A:1002093710287DOIArticle
https://rdcu.be/bFFVcPublisherFree ReadCube access
https://resolver.caltech.edu/CaltechAUTHORS:20200508-160021917Related ItemConference Paper
ORCID:
AuthorORCID
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.
Group:TAPIR
Funders:
Funding AgencyGrant Number
NSFAST 95-29170
NASANAG5-2837
NASANAG5-7007
Subject Keywords:Magnetic Field; Black Hole; Angular Momentum; Recent Result; Accretion Rate
Issue or Number:1-4
Record Number:CaltechAUTHORS:20190605-144045024
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190605-144045024
Official Citation:Blandford, R.D. Astrophysics and Space Science (1998) 261: 245. https://doi.org/10.1023/A:1002093710287
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96163
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:06 Jun 2019 03:22
Last Modified:08 May 2020 23:03

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