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Abstract
This paper reports the detection of thermal emission from the dayside of TRAPPIST-1 c using JWST's MIRI instrument. The measured planet-to-star flux ratio disfavors a thick, CO2-rich atmosphere, ruling out various atmospheric models including cloud-free O2/CO2 mixtures and a Venus-analogue atmosphere. Thinner atmospheres or a bare-rock surface are consistent with the findings, suggesting a volatile-poor formation history for TRAPPIST-1 c.
Publisher
Nature
Published On
Aug 24, 2023
Authors
Sebastian Zieba, Laura Kreidberg, Elsa Ducrot, Michaël Gillon, Caroline Morley, Laura Schaefer, Patrick Tamburo, Daniel D. B. Koll, Xintong Lyu, Lorena Acuña, Eric Agol, Aishwarya R. Iyer, Renyu Hu, Andrew P. Lincowski, Victoria S. Meadows, Franck Selsis, Emeline Bolmont, Avi M. Mandell, Gabrielle Suissa
Tags
TRAPPIST-1 c
thermal emission
atmosphere
JWST
planetary science
CO2-rich
formation history
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