University of Montreal
Phase Curve Observations of TOI 561 b To Study Atmosphere-Interior Exchange — Following the JWST ERS and Cycle 2 GO Announcement of Opportunity published on July 6, 2023, the CSA is providing funding via a Grant Agreement to the university to conduct their research using the JWST data. 

This project seeks to uncover the composition of the lowest density ultra-short period (USP) planet ever observed, TOI-561b. NIRSpec will be used to determine if this planet has at atmosphere at all, as well as determining the composition of that atmosphere. The findings will help elucidate the formation story of under-dense USP planets and connect small planet atmospheres to interior compositions.