Modeled K_s ratio curve for the Tmin (left), mean (middle), and Tmax (right) model setups featuring different bursts (in 10⁴⁷ erg, color-coded). The observed K_s increase is shown in red for comparison. The ratio depends more on the energy input than on the setting. The best agreement is reached for E_acc = 0.93 × 10⁴⁷ erg. For the Tmin setting and the highest burst energies, the K_s curves decay delayed, this might be an artifact due to the innermost dust becoming unrealistically hot (r_min is fixed to 60 au, that is, 3 × R_sub). We note that the ordinate scales are different.