Relation between photometric mass of young stars (M_young) from CIGALE SED fits and the observed Hβ luminosity. Left. In this case, the observed Hβ luminosity is not corrected for evolution. Right. Same as left, but with Hβ luminosity corrected for evolution using the observed EW(Hβ). The solid lines shows a least-squares fits to the data; the dashed line plots the predictions of SB99 models. As is discussed in the text, this is a classical Stork diagram: the logarithm of the distance appears in both axes.