3.3 {\mu}m PAH observations of the central kiloparsecs of Centaurus A
  Aims. The aim of this work is to further investigate the nature of PAH
excitation and emission especially in the context of tracing star formation in
a variety of extragalactic environments. Here we turn our attention to the
energetic environment of the closest AGN in our sample, Centaurus A. Methods.
Using ISAAC on the ESO VLT UT1 (Antu) we have made high spatial resolution 3.3
{\mu}m imaging observations of the central kiloparsec of CenA. These
observations have been compared with star formation tracers in the near- and
mid-infrared, as well as with mid-infrared tracers of nuclear activity.
Results. The nucleus is not devoid of PAH emission, implying that the PAH
particles are not destroyed in the nucleus as might be expected for such a
harsh environment. However, we see the feature to continuum ratio decrease
towards the AGN. As well, the 3.3 {\mu}m PAH feature emission generally traces
the sites of star formation in Cen A, but in detail there are spatial offsets,
consistent with an earlier study of the starburst galaxies NGC 253 and NGC
1808. However, the feature-to-continuum ratio does not drop at the positions of
star formation as was previously seen in that earlier study. The cause for this
difference remains uncertain. Finally, our data reveal possible evidence for a
nearly face-on, circular or spiral, dust structure surrounding the nucleus.
