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Title:
Unified models for active galactic nuclei and quasars
Authors:
Antonucci, Robert
Affiliation:
AA(California Univ., Santa Barbara)
Publication:
In: Annual review of astronomy and astrophysics. Vol. 31 (A94-12726 02-90), p. 473-521. (Annual Reviews Homepage)
Publication Date:
00/1993
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ACTIVE GALACTIC NUCLEI, ASTRONOMICAL POLARIMETRY, QUASARS, RADIO GALAXIES, ASTRONOMICAL SPECTROSCOPY, BL LACERTAE OBJECTS, BLAZARS
DOI:
10.1146/annurev.aa.31.090193.002353
Bibliographic Code:
1993ARA&A..31..473A

Abstract

The straw person model (SPM), in which there are two basic types of AGN, the radio quiets and the radio louds, is presented. For each type there is a range in intrinsic luminosity, and the luminosity controls some properties such as the Fanaroff and Riley classes. Evidence to the effect that orientation effects are important and widespread is presented. A list of types and a summary of the phenomenology of the quiets, a detailed description of the prototype Seyfert 2/1, NGC 1068, and an update on polarization observations of quiets in general, as it bears on unified models, are provided. Evidence is presented for unification of the narrow line radio galaxies with the broad line radio galaxies and lobe-dominant radio quasars, and the resulting relaxation or resolution of the statistical anomalies associated with relativistic beaming.

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