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The Sub-Parsec-Scale Structure and Evolution of Centaurus A at 8.4 and 22.2 GHz

Published online by Cambridge University Press:  12 April 2016

S.J. Tingay ,
D.L. Jauncey ,
J.E. Reynolds ,
A.K. Tzioumis ,
R.A. Preston ,
D.L. Jones ,
D.W. Murphy ,
D.L. Meier ,
J.E.J. Lovell  and
P.M. McCulloch
...Show all authors
S.J. Tingay
Affiliation:
Jet Propulsion Laboratory, Caltech, Pasadena, CA 91109, U.S.A.
D.L. Jauncey
Affiliation:
CSIRO, Australia Telescope National Facility, NSW 2121, Australia
J.E. Reynolds
Affiliation:
CSIRO, Australia Telescope National Facility, NSW 2121, Australia
A.K. Tzioumis
Affiliation:
CSIRO, Australia Telescope National Facility, NSW 2121, Australia
R.A. Preston
Affiliation:
Jet Propulsion Laboratory, Caltech, Pasadena, CA 91109, U.S.A.
D.L. Jones
Affiliation:
Jet Propulsion Laboratory, Caltech, Pasadena, CA 91109, U.S.A.
D.W. Murphy
Affiliation:
Jet Propulsion Laboratory, Caltech, Pasadena, CA 91109, U.S.A.
D.L. Meier
Affiliation:
Jet Propulsion Laboratory, Caltech, Pasadena, CA 91109, U.S.A.
J.E.J. Lovell
Affiliation:
University of Tasmania, Hobart, Tasmania 7001, Australia
P.M. McCulloch
Affiliation:
University of Tasmania, Hobart, Tasmania 7001, Australia
M.E. Costa
Affiliation:
University of Tasmania, Hobart, Tasmania 7001, Australia
G. Nicolson
Affiliation:
Hartebeesthoek Radio Astronomy Observatory, Krugersdorp, South Africa
J.F.H. Quick
Affiliation:
Hartebeesthoek Radio Astronomy Observatory, Krugersdorp, South Africa

Abstract

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We have been observing the sub-parsec-scale radio jet in the nucleus of Centaurus A, the closest active radio galaxy, at 8.4 GHz over the last 6 years with the SHEVE array and most recently with the VLBA at 8.4 and 22.2 GHz. In this paper we will review the results of these observations and give a brief summary of our interpretation, concentrating on the evolution of the sub-parsec-scale jet structure with time; subluminal component motions and rapid short timescale evolution. A full description of this work is soon to be published in a major journal article.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 164: Radio Emission from Galactic and Extragalactic Compact Sources , 1998 , pp. 87 - 88
Copyright
Copyright © Astronomical Society of the Pacific 1998

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