Logarithm of H₂ depletion time τ_H2 plotted against M_star in the left panel, and against specific SFR in the middle and right panels. In the middle and right panels, the heavy dark-gray curves correspond to the binned data medians; only bins with 5 or more galaxies are shown. The gray shadowed regions indicate the range of ±1σ of the binned data. The heavy red long-dashed curves give the xCOLDGASS medians (Saintonge et al. 2017). The right panel shows the impact of using α_CO ∝ (Z/Z_⊙)², rather than the value we find here. Galaxies are colored with 12 + log(O/H) is as in Fig. 2.