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Centaurus A is the closest radio-loud active galaxy. Very Long BaselineInterferometry (VLBI) enables us to study the jet-counterjet system onmilliarcsecond (mas) scales, providing essential information for jet emissionand propagation models. We study the evolution of the central parsec jetstructure of Cen A over 3.5 years. The proper motion analysis of individual jetcomponents allows us to constrain jet formation and propagation and to test theproposed correlation of increased high energy flux with jet ejection events.Cen A is an exceptional laboratory for such detailed study as its proximitytranslates to unrivaled linear resolution, where 1 mas corresponds to 0.018 pc.The first 7 epochs of high-resolution TANAMI VLBI observations at 8 GHz of CenA are presented, resolving the jet on (sub-)mas scales. They show adifferential motion of the sub-pc scale jet with significantly higher componentspeeds further downstream where the jet becomes optically thin. We determinedapparent component speeds within a range of 0.1c to 0.3c, as well as identifiedlong-term stable features. In combination with the jet-to-counterjet ratio wecan constrain the angle to the line of sight to ~12{\deg} to 45{\deg}. The highresolution kinematics are best explained by a spine-sheath structure supportedby the downstream acceleration occurring where the jet becomes optically thin.On top of the underlying, continuous flow, TANAMI observations clearly resolveindividual jet features. The flow appears to be interrupted by an obstaclecausing a local decrease in surface brightness and a circumfluent jet behavior.We propose a jet-star interaction scenario to explain this appearance. Thecomparison of jet ejection times with high X-ray flux phases yields a partialoverlap of the onset of the X-ray emission and increasing jet activity, but thelimited data do not support a robust correlation.

TANAMI monitoring of Centaurus A: The complex dynamics in the inner parsec of an extragalactic jet