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Conclusions * First detection of CH4, and CO2, in a habitable-zone exoplanet — Resolution to missing methane problem in a temperate exoplanet * High CH4, and CO2, and Low NH3; consistent with Hycean world — Composition inconsistent with mini-Neptune or rocky world — New theoretical work needed for alternate explanations * Potential inference of DMS, possible biomarker molecule — More modeling and observations needed for robustness — New theoretical work needed to establish biological activity * Pathway to explore exoplanet habitability with JWST — Hycean worlds to expand and accelerate the search for life

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Conclusions * First detection of CH4, and CO2, in a habitable-zone exoplanet — Resolution to missing methane problem in a temperate exoplanet * High CH4, and CO2, and Low NH3; consistent with Hycean world — Composition inconsistent with mini-Neptune or rocky world — New theoretical work needed for alternate explanations * Potential inference of DMS, possible biomarker molecule — More modeling and observations needed for robustness — New theoretical work needed to establish biological activity * Pathway to explore exoplanet habitability with JWST — Hycean worlds to expand and accelerate the search for life
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Kelly Lepo (kellylepo@astrodon.social)'s status on Wednesday, 13-Sep-2023 01:41:58 JST Kelly Lepo
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And now we move into the exoplanet part of the afternoon.
Results from Nikku Madhusudhan about exoplanet
K2-18 b. They have the first detection of methane and carbon dioxide in a habitable-zone exoplanet.
Press release: https://webbtelescope.org/contents/news-releases/2023/news-2023-139
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In conversation about a year ago from astrodon.social permalink