Bottom panel: luminosity correction factors, (in red) and (in black), plotted as a function of the IR luminosity for galaxies from our comparison sample (see Sect. 2.2). Upper, middle panels: r_2,1 and r_3,1 distributions of z = 0 galaxies (open histograms) and z> 1 galaxies (hatched histograms), respectively, plotted for three L_IR intervals: L_IR< 10¹¹L_⊙ (the “spiral” regime), 10¹¹L_⊙<L_IR< 10¹²L_⊙ (the “LIRG” regime), and L_IR> 10¹²L_⊙ (the “ULIRG” regime) from left to right. The numbers in the upper right corner of each panel are the mean values of the r_J,1 distributions (“thick” numbers refer to z = 0 galaxies and “thin” numbers to z> 1 galaxies).