Fig. 5: Uncertainty of the molecular gas depletion time scaling.

Scaling of the molecular gas depletion time with offset from the star-forming sequence for M_star = 10¹⁰M_⊙ galaxies as predicted by the model trained on the extended xGASS/xCOLD GASS sample and a quantification of the resulting uncertainty. The model prediction is shown by the blue solid line. A double-linear function provides a reasonable approximation, see the magenta dashed curve. The resulting fit parameters are reported in a magenta font in the top left corner of the main figure. Here, α₁ is the slope of lgt_dep with ΔlgSFR for non-starbursting galaxies, while α₂ is the corresponding slope in the highly starforming regime. Solid gray lines show the scaling of t_dep with ΔlgSFR for 100 different choices of the model parameters randomly selected from a Markov Chain Monte Carlo sampling. The inset panel shows the distribution of α₁ based on 1000 such model parameters choices with the white (white + yellow) colored part of the histogram corresponding to the 68% (95%) credibility interval of α₁. Median values and 16th to 84th percentile ranges are listed for both α₁ and α₂.