Top row: radial stellar density profiles for the models. Second row: cold gas (T < 15 000 K) density profile. Third row: star formation rate profile. Bottom row: mean stellar age profile. The vertical dashed red lines show the location of the age minimum for each model, with the red shaded region highlighting the uncertainty of the minimum. In each of our models, R_min coincides with a drop in the gas volume density, SFR, and the break in the stellar density profile (within the error).