Using four JWST/NIRSpec PRISM transits and a new Gaussian Process retrieval that marginalizes over stellar contamination, the authors rule out cloudy, H2-dominated (≳80% by volume) primary atmospheres on TRAPPIST-1 e at >3σ.
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JWST-TST DREAMS: NIRSpec/PRISM Transmission Spectroscopy of the Habitable Zone Planet TRAPPIST-1 e
Using four JWST/NIRSpec PRISM transits and a new Gaussian Process retrieval that marginalizes over stellar contamination, the authors rule out cloudy, H2-dominated (≳80% by volume) primary atmospheres on TRAPPIST-1 e at >3σ.