Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..280e..55h&link_type=abstract
The Molecular Universe, Proceedings of the 280th Symposium of the International Astronomical Union held in Toledo, Spain, May 30
Astronomy and Astrophysics
Astronomy
Scientific paper
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.
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