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The JWST Spectrum of K2-18b | 1. Motivation 2. JWST Observations 3. Atmospheric Retrieval 4. Implications for K2-18 b K2-18 b A Habitable-zone Sub-Neptune transiting a M2.5 V star P = 33 day, transit depth = 3% (Montet et al. 2015) M_p=7.96 +/- 1.91 M_E (Cloutier et al. 2017) R=2.61+/- 0.08 R, (Benneke et al, 2019) Teq = 250-300 K, Earth-like insolation No analogue in the solar system. Image Credits: NASA, ESA, CSA; NN

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The JWST Spectrum of K2-18b | 1. Motivation 2. JWST Observations 3. Atmospheric Retrieval 4. Implications for K2-18 b K2-18 b A Habitable-zone Sub-Neptune transiting a M2.5 V star P = 33 day, transit depth = 3% (Montet et al. 2015) M_p=7.96 +/- 1.91 M_E (Cloutier et al. 2017) R=2.61+/- 0.08 R, (Benneke et al, 2019) Teq = 250-300 K, Earth-like insolation No analogue in the solar system. Image Credits: NASA, ESA, CSA; NN
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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