Stellar mass log M^⋆ (leftmost panels), stellar velocity dispersions σ^* (left central panels), concentration index of galaxies C (right central panels), and log SFR (rightmost panels) versus D_n(4000) index for galaxies in LLGs (upper row), and in HLGs (lower row). Filled circles and triangles show median values of galaxy properties for VO (circles) and YS (triangles) galaxies, as described in the legend in σ^* and in log SFR panels. Horizontal lines show the values of D_n(4000) index D_n(4000) = 1.35 and D_n(4000) = 1.75.