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Strike while the iron is hot: a deep dive into understanding the variability of KELT-9 b’s atmospheric dynamics

Presentation #624.21 in the session Planetary Atmospheres - Hot Jupiters.

Published onApr 03, 2024
Strike while the iron is hot: a deep dive into understanding the variability of KELT-9 b’s atmospheric dynamics

Current models of ultra-hot Jupiter (UHJ) atmospheres highlight the 3D nature of these extreme systems and the relevance of second-order effects such as magnetic drag, molecular dissociation, and cloud formation in shaping their thermal structure. Such effects play a critical role in interpreting these systems with high-resolution spectroscopy, the most promising technique for building a comprehensive vertical and longitudinal picture of UHJ atmospheres. We conduct a case study of the observationally favorable and phenomenologically intriguing system KELT-9 b to build a map of the planet’s atmospheric dynamics as a function of altitude and longitude. We extend our previous exploration of the system’s time-variable signatures, which may be driven by interactions with anisotropic stellar winds or magnetohydrodynamic instabilities. Finally, we introduce our upcoming work connecting these results with variability signatures in TESS phase curves for a population of UHJs.

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