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National Academy of Sciences, Proceedings of the National Academy of Sciences, 25(92), p. 11368-11370, 1995

DOI: 10.1073/pnas.92.25.11368

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Subparsec-scale structure and evolution of Centaurus A (NGC5128).

Journal article published in 1995 by D. L. Jauncey, S. J. Tingay, R. A. Preston, J. E. Reynolds, J. E. J. Lovell, P. M. McCulloch, A. K. Tzioumis, M. E. Costa, D. W. Murphy, D. L. Meier, D. L. Jones, S. W. Amy, J. D. Biggs, D. G. Blair, R. W. Clay and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We present a series of 8.4-GHz very-long-baseline radio interferometry images of the nucleus of Centaurus A (NGC5128) made with a Southern Hemisphere array, representing a 3.3-year monitoring effort. The nuclear radio jet is approximately 50 milliarcseconds in extent, or at the 3.5-megaparsec distance of NGC5128, approximately 1 parsec in length. Subluminal motion is seen and structural changes are observed on time scales shorter than 4 months. High-resolution observations at 4.8 and 8.4 GHz made in November 1992 reveal a complex morphology and allow us to unambiguously identify the self-absorbed core located at the southwestern end of the jet.