Signature of the atmospheric asymmetries of hot and ultra-hot Jupiters in light curves

Abstract

With the new generation of space telescopes such as the James Webb Space Telescope (JWST), it is possible to better characterize the atmospheres of exoplanets. The atmospheres of Hot and are highly heterogeneous and asymmetrical. The difference between the temperatures on the day and night sides is especially extreme in the case of We introduce a new tool to compute synthetic light curves from 3D general circulation model (GCM) simulations, developed in the framework. We show how rotation induces a variation in the flux during the transit that is a source of information on the chemical and thermal distribution of the atmosphere. We find that the day-night gradient linked to has an effect close to stellar limb darkening, but opposite to tidal deformation. We confirm the impact of the atmospheric and chemical distribution on variations in the central transit time, though the variations found are smaller than those in available observational data, which could indicate that the east-west asymmetries are underestimated, due to the chemistry or clouds.