Maps of (from top to bottom) the [Ne II], [Ne III], [Ne V], and [Ne VI] emission lines fitted with one Gaussian component (S/N > 3 at the line peak, see Sect. 2). From left to right, we show the flux maps in erg s⁻¹ cm⁻², the mean velocity, and the velocity dispersion, σ (corrected from the instrumental value), in km s⁻¹. The photometric centre of the continuum for each channel is marked with a white star. The 1″ physical scale is marked with a black line in the left panels. The white and red circles in the [Ne II] and [Ne V] flux maps indicate the integrated regions discussed in the text (see Sect. 3). The FWHM of the PSF is shown as a grey circle in the middle panels. The contours in the velocity maps go from −300 to 300 km s⁻¹. In all panels, north (east) is up (left).