The double phase curve of TRAPPIST-1b and c at 15 microns
- 1University of Liège, Astrobiology Research Unit, AGO, Liège, Belgium (michael.gillon@uliege.be)
- *A full list of authors appears at the end of the abstract
Small rocky planets are now known to be very frequent in temperate orbits around low-mass M-dwarfs. The most pressing question regarding these ubiquitous planets concerns their capacity to maintain significant secondary atmospheres despite the adverse environment (high XUV fluxes, winds) and history (long pre-main-sequence) brought by their small host stars. Here, we present the photometric observation by JWST/MIRI of the combined thermal phase curve of the two inner planets of the TRAPPIST-1 system (Cycle 2 program 3077). These observations aimed to determine if the two planets are bare rocks or not by complementing the Cycle 1 measurements of their daysides' thermal emission at 15 microns (for b and c) and 12.8 microns (for b).
Michaël Gillon, Elsa Ducrot, Eric Agol, Taylor Bell, Brice-Olivier Demory, Chuanfei Dong, Achrene Dyrek, Billy Edwards, Thomas Fauchez, Thomas Greene, Nicolas Iro, Daniel Koll, Laura Kreidberg, Pierre-Olivier Lagage, Andrew Lincoswski, Jacob Lustig-Yaeger, Alice Maurel, Victoria Meadows, Franck Selsis, Martin Turbet, Sebastian Zieba, Julien de Wit, Laetitia Delrez
How to cite: Gillon, M. and the JWST Program 3077 team: The double phase curve of TRAPPIST-1b and c at 15 microns, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-9116, https://doi.org/10.5194/egusphere-egu24-9116, 2024.
