Fig. 13

Left: minima in χ2 plots for the resolving power, Teff, and βvdW (from top to bottom). Right: χ2 maps for the three parameter combinations, βvdW − Teff, βvdW − resolving power, and resolving power − Teff (from top to bottom). The χ2 maps are computed for the minimum value of the leftover parameter on the left hand side.
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