Left panel: distribution of a_IR coefficients as a function of the galaxies axial ratio for the Hα+22 μm hybrid tracer. Orange points show type-2 AGN galaxies while blue points represent star-forming galaxies. Filled contours represent the 1σ dispersion after applying a 5σ rejection around the mean value expressed as a blue (orange) solid line for the SF (type-2 AGN) galaxies. The corresponding histogram with the distribution of the number of galaxies for each axial ratio is plotted on the top for reference applying the same color-coding. Right panel: same as the left panel, except showing the Hα+TIR hybrid tracer. The SF objects with low axial ratios (where highly-inclined disk galaxies would be located) show similar a_IR values as the rest of the galaxies. Lower a_IR would be expected if a fraction of the Hα emission is completely obscured.