Optimally sampled most-, second-, and third-massive star to be found in a galaxy as a function of the galaxy-wide SFR. These stars are shown as a solid curve, blue dashed curve, and green dotted curve, respectively, resulting from a combination of Figs. 1 and 2. The thin horizontal dashed line indicates the mass limit below which SNII explosions are not likely (8 M_⊙), and the vertical thin dashed line shows the SFR below which galaxies are not expected to host SNII events, subject to the axioms adopted in the present study. See Sect. 4.7 for more details.