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 ≈50 milliarcseconds in extent, or at the 3.5-megaparsec distance of NGC5128...

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Veröffentlicht in:	Proceedings of the National Academy of Sciences - PNAS 1995-12, Vol.92 (25), p.11368-11370
Hauptverfasser:	Jauncey, D. L., Tingay, S. J., Preston, R. A., Reynolds, J. E., Lovell, J. E. J., McCulloch, P. M., Tzioumis, A. K., Costa, M. E., Murphy, D. W., Meier, D. L., Jones, D. L., Amy, S. W., Biggs, J. D., Blair, D. G., Clay, R. W., Edwards, P. G., Ellingsen, S. P., Ferris, R. H., Gough, R. G., Harbison, P., Jones, P. A., King, E. A., Kemball, A. J., Migenes, V., Nicolson, G. D., Sinclair, M. W., Ommen, T. V., Wark, R. M., White, G. L.
Format:	Artikel
Sprache:	eng
Schlagworte:	Antennas Astronomy Evolution Flux density Galactic structure Imaging Kinetics Position angle Radio interferometry Radio telescopes Southern hemisphere Stars & galaxies Very Large Array
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Beschreibung
Zusammenfassung:	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 ≈50 milliarcseconds in extent, or at the 3.5-megaparsec distance of NGC5128, ≈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.
ISSN:	0027-8424 1091-6490
DOI:	10.1073/pnas.92.25.11368