  Centaurus A is one of the closest radio-galaxies to Earth. Its proximity
allowed us to extensively study its active galactic nucleus but the core
emission mechanism remains elusive because of local strong dust and gas
obscuration. The capability of polarimetry to shave-off contaminating emission
has been exploited without success in the near-infrared by previous studies but
the very recent measurement of the 2 - 8 keV polarization by the Imaging X-ray
Polarimetry Explorer (IXPE) brought the question back to the fore. To determine
what is the prevalent photon generation mechanism to the multi-wavelength
emission from the core of Centaurus A, we retrieved from the archives the
panchromatic polarization measurements of the central compact component. We
built the total and polarized flux spectral energy distributions of the core
and demonstrated that synchrotron self-Compton models nicely fit the polarized
flux from the radio to the X-ray band. The linear polarization of the
synchrotron continuum is perpendicular to the jet radio axis from the optical
to the radio band, and parallel to it at higher energies. The observed smooth
rotation of the polarization angle in the ultraviolet band is attributed to
synchrotron emission from regions that are getting closer to the particle
acceleration site, where the orientation of the jet's magnetic fields become
perpendicular to the jet axis. This phenomenon support the shock acceleration
mechanism for particle acceleration in Centaurus A, in line with IXPE
observations of several high-synchrotron peak blazars.
