Left panel: correlation between the inner (grey–red) and outer (grey–blue) gradient of log  μ_⋆ and the morphological type. The results are shown for the GMe (stars) and CBe (circles) SSP models. The inner gradient is calculated between the galaxy nucleus and 1 HLR, and the outer gradient between 1 HLR and 2 HLR. Right panel: correlation between the inner gradient of log  μ_⋆ and the galaxy stellar mass. Small dots represent the results for each galaxy, and black crosses the average for each 0.3 dex mass bin. Large circles represent the averaged inner gradient in mass intervals of 0.3 dex for each color-coded morphological type. Black crosses show the average correlation between the inner gradient of log μ_⋆ and galaxy mass independent of the morphological type.