Fig. 4: The JWST-PRISM transmission spectrum of WASP-39b with key contributions to the atmospheric spectrum.
From: Early Release Science of the exoplanet WASP-39b with JWST NIRSpec PRISM
The black points with error bars correspond to the measured FIREFLy transit depths of the spectrophotometric light curves at different wavelengths. The best-fitting model spectrum from the PICASO 3.0 grid is shown as the grey line and the coloured regions correspond to the chemical opacity contributions at specific wavelengths. The best-fitting 1D RCTE model corresponds to a super-solar metallicity and super-solar carbon-to-oxygen ratio with moderate cloud opacity (Methods). The PRISM transmission spectrum is explained by contributions from Na (19σ), H2O (33σ), CO2 (28σ), CO (7σ), SO2 (2.7σ) and clouds (21σ). The data do not provide evidence of CH4, H2S and K absorption (Methods). Also, note that the detector was saturated to varying degrees between 0.8 and 1.9 µm. As before, the error bars are 1 − σ standard deviations.
