Observational distinction between two types of active galactic nuclei

Using three criteria, the observational distinction between relativistic beaming and pure accretion for 69 active galaxies, including Seyferts, Quasars, and BL Lac objects are discussed. The first criterion is whether the inferred efficiency of the conversion of accreted matter into energy is greate...

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Bibliographic Details
Published in:The Astronomical journal 1991, Vol.101 (1), p.71-77
Main Authors: XIE, G. Z, LIU, F. K, LIU, B. F, LI, K. H, LU, R. W, LU, J. F
Format: Article
Language:English
Subjects:
640105 - Astrophysics & Cosmology- Galaxies
ACCRETION DISKS
Astronomy
BEAMS
BL LACERTAE OBJECTS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CLASSIFICATION
COSMIC RADIO SOURCES
Earth, ocean, space
ELECTRON BEAMS
ENERGY RANGE
Exact sciences and technology
GALAXIES
GALAXY NUCLEI
Interstellar medium (ism) and nebulae in external galaxies
LEPTON BEAMS
LUMINOSITY
OPTICAL PROPERTIES
PARTICLE BEAMS
PHYSICAL PROPERTIES
PLASMA JETS
QUASARS
RELATIVISTIC RANGE
SEYFERT GALAXIES
STAR ACCRETION
STAR EVOLUTION
Stellar systems. Galactic and extragalactic objects and systems. The universe
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Summary:Using three criteria, the observational distinction between relativistic beaming and pure accretion for 69 active galaxies, including Seyferts, Quasars, and BL Lac objects are discussed. The first criterion is whether the inferred efficiency of the conversion of accreted matter into energy is greater than 0.1 or not. The second one is whether the observed flux is larger than the classical Eddington luminosity or not. The third is concerned in the strong coupling of geometrical and physical effects in jets. The result suggests distinguishing active galactic nuclei into two types. (Author)
ISSN:0004-6256
1538-3881
DOI:10.1086/115667