HÉBRARD, Eric

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HÉBRARD, Eric
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Observatoire aquitain des sciences de l'univers [OASU]
Université Sciences et Technologies - Bordeaux 1 [UB]
Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]

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Ce document a été publié dans

2011IAUS..280E..55H The Molecular Universe, Proceedings of the 280th Symposium of the International Astronomical Union held in Toledo, Spain, May 30-June 3, 2011., p.55, 2011IAUS..280E..55H The Molecular Universe, Proceedings of the 280th Symposium of the International Astronomical Union held in Toledo, Spain, May 30-June 3, 2011., p.55, 2011, Tolede. 2011-05, vol. 280, p. 55

Résumé en anglais

Exoplanet atmospheres that can be characterized with current instrumentations are hot, subjected to very high UV fluxes and undergo strong circulation, a situation radically different from what is found in the atmospheres of our own Solar System. As a matter of fact, traditional models, adapted to model (sub)stellar atmospheres or Solar System planetary atmospheres, fail to provide a reliable description of their composition. It seems indeed mandatory to combine thermochemical reactions with non-equilibrium processes such as vertical transport and photochemical processes. The knowledge of the temperature-dependencies, especially at high temperatures, of some key parameters - IR absorption coefficients k λ(T), UV absorption cross-sections σ(T) and chemical kinetics reaction rates k(T) - is also crucial to insure the reliability of hot atmospheres modelling and the interpretation of current observations.< Réduire

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Laboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804