Reduced chi-square N_tot−T_gas maps resulting from the fitting of 0D LTE gas slab models to the MIRI MRS spectrum for various molecular species at increasing wavelength. The fit of the carbon dioxide isotopologues, ¹³CO₂, ¹⁶O¹²C¹⁸O, and ¹⁶O¹²C¹⁷O with fixed/free emitting radius are labeled in figure. In colorbar are the ${\chi }_{red}^2$/χ² values, with 1.0 corresponding to the best-fit model. The white contours show the range of fit emitting radii in au, while the red contours show the 1σ, 2σ, and 3σ confidence intervals. The location of the best-fit models in the parameter space is indicated by a black cross marker.