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water-rich-abiotic · hu2025k218b

Revision 2beeb722-2fbe-4176-9399-5a5456cc3d35 · 11/5/2026, 11:07:53 PM UTC
Citation
hu2025k218b
Claim ID
water-rich-abiotic
Assertion
Four new JWST NIRSpec transit observations robustly detect CH4 and CO2 and indicate a water-rich planet. The spectrum contains only marginal DMS signals, below about 2 sigma without a strong haze. Photochemical models show DMS may form without life in massive hydrogen-rich atmospheres of high metallicity.
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