Distributions of the photometric parameters discussed in Sect. 3 (top), and parameter values plotted against morphological T-type (bottom). From left to right: the parameters shown are: decimal logarithm of stellar mass (in solar units); concentration parameter C₈₂ (Eq. (6)); concentration parameter C₃₁ (Eq. (5)); logarithm of the μ_3.6, AB = 25.5 mag arcsec⁻² isophotal radius in kiloparsecs; and logarithm of the half-light (∼half-mass) radius in kiloparsecs. Solid red lines show the median value of each parameter measured in bins of ΔT = 1, while dashed red lines show the associated first and third quartiles. Unfilled histograms and gray points show distributions for all the galaxies, while filled histograms and black points show distributions for galaxies with T ≤ 0 and T = 11 (ETGs).