Centaurus A, The Core of the Problem

S.J. Tingay, D.L. Jauncey, R.A. Preston, J.E. Reynolds, D.L. Meier, A.K. Tzioumis, D.L. Jones, E.A. King, S.W. Amy, J.D. Biggs, David Blair, D. Campbell-Wilson, R.W. Clay, M.E. Costa, P.G. Edwards, R.H. Ferris, R.G. Gough, P. Harbison, D.W. Hoard, P.A. JonesJ.E. Lovell, A.J. Kemball, W.B. Mcadam, G. Maccleod, P.M. Mcculloch, V. Migenes, D.W. Murphy, G.D. Nicolson, J.F.H. Quick, M.W. Sinclair, L. Skjerve, M.E. St John, T. Van Ommen, R.M. Wark, G.L. White

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Web of Science)


    The bright, peculiar elliptical galaxy Centaurus A (NGC 5128, PKS 1322-427) was one of the first extragalactic radio sources to be optically identified (Bolton et al. 1949). At a distance of 4 Mpc, Centaurus A is the closest active radio galaxy and affords the highest linear imaging resolution (1 mas approximate to 0.02 pc) and hence the best prospects for studying an active nucleus close to the central radio source. We present the results of multi-epoch, 8.4-GHz, very long baseline interferometry (VLBI), imaging observations of the nucleus made over the past three years. The nucleus possesses a core-jet structure where the inner portion of the jet shows apparent linear motion with a velocity substantially less than the speed of light.
    Original languageEnglish
    Pages (from-to)619-624
    JournalAustralian Journal of Physics
    Publication statusPublished - 1994


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