Confidence intervals of the input parameters for model star CS29497–034. Panels b) and c): one-dimensional confidence intervals of P_i and M_1,i, respectively. Long-dashed lines indicate the thresholds Δχ² = 1, 4, 9. Panel a): two-dimensional confidence intervals. The thresholds Δχ² = 2.30, 6.17, 11.8 are represented as solid, dashed and dotted lines, respectively. The blue plus sign indicates the best model.