Fig. 3: Spectra from three independent 1D RCTE models and their residuals, fit to the weighted-average WASP-39b G395H transmission spectrum. | Nature

Fig. 3: Spectra from three independent 1D RCTE models and their residuals, fit to the weighted-average WASP-39b G395H transmission spectrum.

From: Early Release Science of the exoplanet WASP-39b with JWST NIRSpec G395H

Fig. 3

a, Spectra from the three models. b, Their residuals. The models are dominated by absorption from H2O and CO2 with a grey-cloud-top pressure corresponding to ≈1 mbar. The models find that the data are best explained by 3–10 times solar metallicity (M/H) and sub-solar to solar C/O (C/O = 0.30–0.46). The extra absorption owing to SO2, seen in the spectrum around 4.1 μm, is not included in the RCTE model grids and causes a marked impact on the χ2/N (see Fig. 4).

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