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The Magnetic Switch as the Origin of the FR I/FR II Break

Published online by Cambridge University Press:  12 April 2016

D.L. Meier ,
P. Godon ,
S. Edgington ,
D.G. Payne  and
K.R. Lind
D.L. Meier
Affiliation:
Jet Propulsion Laboratory, Caltech, Pasadena, CA 91109, U.S.A.
P. Godon
Affiliation:
Jet Propulsion Laboratory, Caltech, Pasadena, CA 91109, U.S.A.
S. Edgington
Affiliation:
Jet Propulsion Laboratory, Caltech, Pasadena, CA 91109, U.S.A.
D.G. Payne
Affiliation:
Intel Corporation, Hillsboro, OR 97124, U.S.A.
K.R. Lind
Affiliation:
Digital Equipment Corporation, LLNL, L-560, Livermore, CA 94550, U.S.A.

Abstract

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We propose that the Fanaroff & Riley division between class I and class II radio sources has its origins in the coronae of magnetized accretion disks around black holes. The “magnetic switch”, an effect that critically controls the speed of jets produced by such disks, can explain both qualitative and quantitative differences in the properties of the two classes. These include why morphology and jet speed are functions of radio power and why the division between the two classes is a strong function of galaxy optical luminosity.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 164: Radio Emission from Galactic and Extragalactic Compact Sources , 1998 , pp. 51 - 52
Copyright
Copyright © Astronomical Society of the Pacific 1998

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