Status Report

The AGN Paradigm for Radio-Loud Objects

By SpaceRef Editor
January 17, 2003
Filed under , ,

Astrophysics, abstract

From: C. Megan Urry <>
Date: Thu, 16 Jan 2003 00:08:43 GMT (184kb)

The AGN Paradigm for Radio-Loud Objects

Meg Urry

Comments: Invited Review given at the Paris Conference on AGN, July 2002. To be
published in Active Galactic Nuclei: from Central Engine to Host Galaxy, ed.
S. Collin, F. Combes, and I. Shlosman, ASP Conf. Series, p. 2-12

Radio-loud AGN are characterized by relativistic jets originating near the
central supermassive black hole and forming large-scale radio sources at parsec
to kiloparsec to Megaparsec distances. The jets are energetically significant,
in many cases representing the bulk of the energy extracted from the accretion
process. Host galaxies are apparently normal luminous ellipticals, supporting
the “Grand Unification” scenario wherein AGN are a transient phase in the
evolution of every galaxy. Black hole mass appears to be largely uncorrelated
with bolometric luminosity, Eddington ratio, radio luminosity, or radio

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