Distribution of for spectroscopically confirmed stars (dashed histograms) and galaxies (solid histograms) for the VVDS-Wide spectroscopic sample in W4. The sample is split into a bright and faint sample, corresponding to the split used to classify VIPERS galaxies. Ideally, one would expect that all galaxies have , while stars are confined to positive values. However, as can be seen, tails of both populations overlap each other. Top: no selection is applied on the half-flux radius r_h. Middle: only objects with r_h ≥ μ_rh + 3σ_rh are considered (i.e. “geometric” galaxies). Bottom: only objects with r_h<μ_rh + 3σ_rh are considered (i.e. “geometric” stars).