Distribution of the χ² values, computed during the forward seismic modeling of HD 43317 based on 16 of the 28 observed frequencies, using the refined grid of MESA models. The χ² values for the 2σ and 3σ confidence intervals are indicated by the dotted and dashed black lines, respectively. The best 20 models are indicated by the black crosses. We refer to Table 2 for the description of the physical quantities.