FALCO, Aurélien; LECONTE, Jérémy; MECHINEAU, Alexandre; PLURIEL, William

doi:10.1051/0004-6361/202348880

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FALCO, Aurélien
Laboratoire de Météorologie Dynamique (UMR 8539) [LMD]
Institut de Physique du Globe de Paris [IPGP (UMR_7154)]
Laboratoire Aimé Cotton [LAC]

LECONTE, Jérémy
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]

MECHINEAU, Alexandre
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]

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Astronomy and Astrophysics - A&A. 2024, vol. 685, p. A125

EDP Sciences

Résumé en anglais

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 ultra-hot Jupiters are highly heterogeneous and asymmetrical. The difference between the temperatures on the day and night sides is especially extreme in the case of ultra-hot Jupiters. We introduce a new tool to compute synthetic light curves from 3D general circulation model (GCM) simulations, developed in the Pytmosph3R 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 ultra-hot Jupiters 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.< Réduire

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techniques: spectroscopic

planets and satellites: atmospheres

planets and satellites: gaseous planets

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

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