The JWST transmission spectrum of TOI-1231 b shows strong CH4 detection and moderate CO2 evidence, consistent with a deep H2-rich atmosphere and no distinct surface.
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Transmission Spectrum of the Benchmark Temperate Exo-Neptune TOI-1231 b
The JWST transmission spectrum of TOI-1231 b shows strong CH4 detection and moderate CO2 evidence, consistent with a deep H2-rich atmosphere and no distinct surface.