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• W3100105941 endingPage "194" @default.
• W3100105941 startingPage "194" @default.
• W3100105941 abstract "The TRAPPIST-1 system, consisting of an ultra-cool host star having seven known Earth-size planets will be a prime target for atmospheric characterization with JWST. However, the detectability of atmospheric molecular species may be severely impacted by the presence of clouds and/or hazes. In this work, we perform 3-D General Circulation Model (GCM) simulations with the LMD Generic model supplemented by 1-D photochemistry simulations at the terminator with the Atmos model to simulate several possible atmospheres for TRAPPIST-1e, 1f and 1g: 1) modern Earth, 2) Archean Earth, and 3) CO2-rich atmospheres. JWST synthetic transit spectra were computed using the GSFC Planetary Spectrum Generator (PSG). We find that TRAPPIST-1e, 1f and 1g atmospheres, with clouds and/or hazes, could be detected using JWST's NIRSpec prism from the CO2 absorption line at 4.3 um in less than 15 transits at 3 sigma or less than 35 transits at 5 sigma. However, our analysis suggests that other gases would require hundreds (or thousands) of transits to be detectable. We also find that H2O, mostly confined in the lower atmosphere, is very challenging to detect for these planets or similar systems if the planets' atmospheres are not in a moist greenhouse state. This result demonstrates that the use of GCMs, self-consistently taking into account the effect of clouds and sub-saturation, is crucial to evaluate the detectability of atmospheric molecules of interest as well as for interpreting future detections in a more global (and thus robust and relevant) approach." @default.
• W3100105941 created "2020-11-23" @default.
• W3100105941 creator A5008973078 @default.
• W3100105941 creator A5021233878 @default.
• W3100105941 creator A5037306893 @default.
• W3100105941 creator A5037680611 @default.
• W3100105941 creator A5043906566 @default.
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• W3100105941 creator A5048423230 @default.
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• W3100105941 creator A5056707598 @default.
• W3100105941 creator A5070842570 @default.
• W3100105941 creator A5076799006 @default.
• W3100105941 creator A5080101784 @default.
• W3100105941 date "2019-12-19" @default.
• W3100105941 modified "2023-10-14" @default.
• W3100105941 title "Impact of Clouds and Hazes on the Simulated <i>JWST</i> Transmission Spectra of Habitable Zone Planets in the TRAPPIST-1 System" @default.
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