Left: difference between the radial velocities of the stars and the Hα gas in the BCG core. Right: ratio between the velocity dispersion of the stars and the Hα gas in the core of the system. To better visualise the results, we present maps showing just the most central regions of the BCG, corresponding to a spatial scale of 45 × 45 kpc. The white background corresponds to the spaxels, where the S/N_{stellar continuum} < 10. The cross shows the location of the AGN.