New analysis of HST plus JWST spectra finds near-solar water and carbon dioxide and a strongly sub-solar carbon-to-oxygen ratio in HD 209458b, but the C/O value depends on a ground-based CO prior.
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Osiris revisited: Confirming a solar metallicity and low C/O in HD 209458b
New analysis of HST plus JWST spectra finds near-solar water and carbon dioxide and a strongly sub-solar carbon-to-oxygen ratio in HD 209458b, but the C/O value depends on a ground-based CO prior.