The sub-parsec-scale structure and evolution of the jet in centaurus A.

We present dual-frequency, co-eval very long baseline interferometry observations of the sub-parsec-scale radio source in Centaurus A which identify the core of the radio source, the origin of the parsec-scale and kiloparsec-scale radio emission. In addition we present multi-epoch observations at a frequency of 8.4 GHz which show the complex evolution of the sub-parsec-scale morphology over a 3.3 year period. Subluminal motion is seen and structural changes observed on time-scales shorter than four months. [ABSTRACT FROM AUTHOR]