Top left: histogram of the UV heating fraction ξ_UV for the galaxies in the sample. Top right: box plots of ξ_UV for different morphological types. Red lines indicate the median values, boxes the 1st and 3rd quantiles. Outliers are plotted as black squares. Middle row: correlations between the UV heating and HI deficiency, SFR, and stellar mass. Bottom row: correlations between the UV heating and sSFR and between the SFR surface density and stellar mass surface density. Green circles are classified as strong AGNs. The Kendall τ correlation coefficients and corresponding p-values are indicated for each scatter plot. Average error bars are shown in green.