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A novel interpretation of the cosmic conspiracy in AGNs*

Published online by Cambridge University Press:  19 July 2016

Colin S. Coleman
Colin S. Coleman*
Affiliation:
Department of Astrophysics, South Parks Road, Oxford, OX13RQ, England

Abstract

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The flat radio spectra of core dominated AGNs are often attributed to a superposition of optically thick synchrotron components. This is known as the cosmic conspirac A radio index pr ∼0 is not a natural consequence of this model, and an alternative model proposed here interprets the source components as regions in which relativistic electrons stream along a magnetic field. Stream collimation is determined by plasma instabilities, and components are assumed to be optically thin, with cyclotron turnover at low frequencies. An appealing feature of this model is that radio photon index depends only upon electron energy distribution, which may be obtained from the photon index above the turnover frequency. An energy power-law with index s≥3 is typical for these sources, and implies a flat radio spectrum with pr = (4/3)-p ∼0.

Type
IV. Prime Movers, Models and Mechanisms
Information
Symposium - International Astronomical Union , Volume 119: Quasars , 1986 , pp. 421 - 423
Copyright
Copyright © Reidel 1986 

References

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