Star formation rate surface densities Σ_SFR for the different galaxies. Each panel shows the 10″ × 10″ zoom to the region around the NSCs. The positions of the NSCs are highlighted by the circles. Each circle has a radius corresponding to the PSF FWHM. The dashed circles highlight the circumnuclear region at 2″, defined by an annulus with inner radius of 8 pixel = 1.6″ and outer radius of 13 pixel = 2.6″. Regions with low signal-to-noise in the Hα flux were masked.