Cel Which molecules are present in the atmosphere of exoplanets? What are their mass, radius and age? Do they have clouds, convection (atmospheric turbulence), fingering convection, or a circulation induced by irradiation? These questions are fundamental in exoplanetology in order to study issues such as planet formation and exoplanet habitability.Yet, the impact of fingering convection and circulation induced by irradiation remain poorly understood: - Fingering convection (triggered by gradients of mean-molecular-weight) has already been suggested to happen in stars (accumulation of heavy elements) and in brown dwarfs and exoplanets (chemical transition e.g. CO/CH4). A large-scale efficient turbulent transport of energy through the fingering instability can reduce the temperature gradient in the atmosphere and explain many observed spectral properties of brown dwarfs and exoplanets. Nonetheless, this large-scale efficiency is not yet characterized and standard approximations (Boussinesq) cannot be used to achieve this goal. - The interaction between atmospheric circulation and the fingering instability is an open question in the case of irradiated exoplanets. Fingering convection can change the location and magnitude of the hot spot induced by irradiation, whereas the hot deep atmosphere induced by irradiation can change the location of the chemical transitions that trigger the fingering instability. This project will characterize the impact of fingering convection in the atmosphere of stars, brown dwarfs, and exoplanets and its interaction with the circulation in the case of irradiated planets. By developing innovative numerical models, we will characterize the reduction of the temperature gradient of the atmosphere induced by the instability and study the impact of the circulation. We will then predict and interpret the mass, radius, and chemical composition of exoplanets that will be observed with future missions such as the James Webb Space Telescope (JWST). Dziedzina nauki natural sciencesphysical sciencesastronomyspace explorationnatural sciencesphysical sciencesastronomyphysical cosmologygalaxy evolution Słowa kluczowe Atmospheres Stars Brown dwarfs Exoplanets numerical simulations Program(-y) H2020-EU.1.1. - EXCELLENT SCIENCE - European Research Council (ERC) Main Programme Temat(-y) ERC-2017-STG - ERC Starting Grant Zaproszenie do składania wniosków ERC-2017-STG Zobacz inne projekty w ramach tego zaproszenia System finansowania ERC-STG - Starting Grant Instytucja przyjmująca COMMISSARIAT A L ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES Wkład UE netto € 1 500 000,00 Adres RUE LEBLANC 25 75015 PARIS 15 Francja Zobacz na mapie Region Ile-de-France Ile-de-France Paris Rodzaj działalności Research Organisations Linki Kontakt z organizacją Opens in new window Strona internetowa Opens in new window Uczestnictwo w unijnych programach w zakresie badań i innowacji Opens in new window sieć współpracy HORIZON Opens in new window Koszt całkowity € 1 500 000,00 Beneficjenci (1) Sortuj alfabetycznie Sortuj według wkładu UE netto Rozwiń wszystko Zwiń wszystko COMMISSARIAT A L ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES Francja Wkład UE netto € 1 500 000,00 Adres RUE LEBLANC 25 75015 PARIS 15 Zobacz na mapie Region Ile-de-France Ile-de-France Paris Rodzaj działalności Research Organisations Linki Kontakt z organizacją Opens in new window Strona internetowa Opens in new window Uczestnictwo w unijnych programach w zakresie badań i innowacji Opens in new window sieć współpracy HORIZON Opens in new window Koszt całkowity € 1 500 000,00