Hα line-profiles integrated spectra (black) in two different regions of 1.2 × 1.2 kpc along the minor axis (Fig. 5), respectively, towards the NE (top) and the SW (bottom). Below, the residuals (i.e., data – model) are also presented. Since the asymmetry of the observed profile the NEspectrum, two components are needed to properly fit the line profile. The narrow component is shown in red in both panels, while the broad one (likely due to outflowing gas) is shown in blue only in the NE spectrum (top). The systemic velocity is shown in green with a vertical dashed line, as reference.