High-resolution CRIRES+ spectroscopy yields a 3.6 S/N cross-correlation signal for CO2 in GJ 1214 b, with Bayesian retrievals giving metallicity 0.48, cloud deck pressure log Pc = -3.04, and temperature 398 K, consistent with JWST within 1.5 sigma.
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Cloudy with a chance of metals: Indications of CO$_2$ in the atmosphere of GJ 1214 b from high-resolution K-band spectroscopy
High-resolution CRIRES+ spectroscopy yields a 3.6 S/N cross-correlation signal for CO2 in GJ 1214 b, with Bayesian retrievals giving metallicity 0.48, cloud deck pressure log Pc = -3.04, and temperature 398 K, consistent with JWST within 1.5 sigma.