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

doi:https://doi.org/10.1017/s0252921100044663

Open AccessArticle10.1017/s0252921100044663

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

S. J. Tingay,D. L. Jauncey,J. E. Reynolds,A. K. Tzioumis,R. A. Preston,D. L. Jones+7 more-1998-01-01-International Astronomical Union Colloquium

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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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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.

Keywords

ParsecCentaurus APhysicsAstrophysicsScale (ratio)Active galactic nucleusJet (fluid)Radio galaxy

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