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The Low Frequency Variability of Extragalactic Radio Sources

Published online by Cambridge University Press:  04 August 2017

D.R. Altschuler ,
B.K. Dennison ,
K.J. Mitchell ,
S.L. O'Dell ,
J.J. Broderick ,
J.J. Condon  and
H.E. Payne
D.R. Altschuler
Affiliation:
Max-Planck-Institut für Radioastronomie Auf dem Hügel 69, D-5300 Bonn, FRG Physics Department, Faculty of Natural Sciences University of Puerto Rico, Rio Piedras, Puerto Rico 00931
B.K. Dennison
Affiliation:
Department of Physics, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
K.J. Mitchell
Affiliation:
NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
S.L. O'Dell
Affiliation:
Department of Physics, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
J.J. Broderick
Affiliation:
Department of Physics, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
J.J. Condon
Affiliation:
National Radio Astronomy Observatory Edgemont Road, VA 22903, USA
H.E. Payne
Affiliation:
National Radio Astronomy Observatory Edgemont Road, VA 22903, USA

Abstract

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The spectral evolution between 0.3 and 15 GHz of the extragalactic radio sources 0235+164 and 1611+343 (DA406) is presented. The data show two very different forms of behavior. For 0235+164 the variations over the entire frequency range are correlated and consistent with being intrinsic to the source, whereas for DA406 an extrinsic cause for the variability seems probable.

Type
IV. Variability
Information
Symposium - International Astronomical Union , Volume 121: Observational Evidences of Activity of Galaxies , 1987 , pp. 211 - 214
Copyright
Copyright © Reidel 1987 

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