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Due to the proximity, the neutral hydrogen belonging to Centaurus A can beobserved at high resolution with good sensitivity. This allows to study themorphology and kinematics in detail in order to understand the evolution ofthis radio-loud source (e.g. merger history, AGN activity). At the same time,it is important to compare the results to other sources of the same class (i.e.early-type galaxies in general and radio galaxies in particular) to see howCentaurus A fits into the global picture of early-type/radio galaxy evolution.The amount of HI, the morphology of a warped disk with HI clouds surroundingthe disk and the regular kinematics of the inner part of the HI disk are notunusual for early-type galaxies. The growing evidence that mergers are notnecessarily responsible for AGN activity fits with the observational resultthat the recent merger event in Centaurus A is not connected to the currentphase of activity. Based on these results, we conclude that Centaurus A hastypical neutral hydrogen properties for an early-type and radio galaxy and itcan therefore - from an HI perspective - be seen as a typical example of itsclass.

Is Centaurus A special? A neutral hydrogen perspective