Relation between / and the total stellar mass. Points are colored according to the luminosity weighted age of the stellar population at . Galaxies with concentration index C ≥ 2.8 are marked with a cross. Dashed blue line shows the fit for all the galaxies with log M_∗ (M_⊙) ≤ 11, dashed red for log M_∗ (M_⊙) > 11, and dotted blue and red lines are the fit for disk dominated galaxies and spheroidal galaxies, respectively.