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1998•International Astronomical Union ColloquiumOpen access

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

Steven John Tingay, David L Jauncey, John E. Reynolds III, Anastasios K. Tzioumis, Robert A. Preston, D. L. Jones, D. W. Murphy, David L. Meier, James E. J. Lovell, P. M. McCulloch, M. E. Costa, George D. Nicolson, Jonathan F. H. Quick

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Abstract

Abstract 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.

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Abstract 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.

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Available abstract

Abstract 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.

Key concepts: Parsec, Centaurus A, Physics, Astrophysics, Scale (ratio), Active galactic nucleus, Jet (fluid), Radio galaxy

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