Dependence of the kinetic energy of ionised gas E_kin in the regions of locally elevated velocity dispersion on the mass of the stellar associations within them (left panels), and their gas kinetic energy per area, Σ_Ekin, vs. corresponding stellar mass surface density, Σ_⋆ (right panels). Top and bottom panels correspond to minimal and maximal values of n_e underlying the E_kin measurements. Colour encodes the Hα flux surface brightness. The red line shows the median values of E_kin or Σ_Ekin in several bins, and the red shaded area corresponds to the 25–75 percentile interval. Spearman correlation coefficients ρ are given above the plots.