Extended Data Fig. 7: Model transmission spectra of WASP-39b with PHOENIX and gCMCRT with varying abundances of SO2.
From: Early Release Science of the exoplanet WASP-39b with JWST NIRSpec G395H
Model transmission spectra compared with the observed spectral feature at 4.1 μm in the G395H data. At wavelengths short of 3.95 μm, which is outside the SO2 band, all models overlap, further suggesting that the data can be explained by the presence of SO2 in the atmosphere. By interpolating these 10 times solar metallicity models, we find a best-fit SO2 abundance of 4.6 ± 0.67 ppm. With the best-fit PICASO 3.0 at 3 times solar metallicity, we find an SO2 abundance of 2.5 ± 0.65 ppm.
