Preprint
Quantifying thermal water dissociation in the dayside photosphere of WASP-121 b using NIRPS
Abstract
The intense stellar irradiation of ultra-hot Jupiters results in some of the most extreme atmospheric environments in the planetary regime. On their daysides, temperatures can be sufficiently high for key atmospheric constituents to thermally dissociate into simpler molecular species and atoms. This dissociation drastically changes the atmospheric opacities and, in turn, critically alters the temperature structure, atmospheric dynamics, and …
Authors
Bazinet L; Allart R; Benneke BR; Pelletier S; Wardenier JP; Cook NJ; Forveille T; Nielsen LD; Moulla KA; Artigau ÃT
Publication date
August 8, 2025
DOI
10.48550/arxiv.2508.06626
Preprint server
arXiv