Subparsec-scale structure and evolution of Centaurus A (NGC5128).
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.
Jauncey
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Tingay
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Preston
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Reynolds
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Lovell
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McCulloch
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Tzioumis
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Costa
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Murphy
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Meier
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Jones
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Harbison
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Migenes
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Nicolson
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