Simulation of fingering convection in the atmosphere of brown dwarfs and exoplanets   

PhD position opened for applications


This thesis aims to study the atmospheres of exoplanets and brown dwarfs in order to correctly interpret the data that will be obtained as part of the JWST (James Webb Space Telescope) space mission. The successful candidate will develop and run High Performance Computing (HPC) simulations of fingering convection (stratified hydrodynamics with mean-molecular-weight instabilities) within the ERC Project ATMO . The target application is fingering convection triggered by chemical transitions (e.g. CO/CH4) in the atmosphere of brown dwarfs and non-irradiated exoplanets (Tremblin et al. 2016). The goal is to produce and use high-end simulation tools designed for the next generation of largest supercomputers (GPUs, Xeon Phis, etc) for the study of fingering convection in these objects, by using an innovative numerical solver for low- and high- Mach flows and adaptive mesh refinement (AMR). These results will then be used for the interpretation of JWST data, to get access to a robust estimation of the chemical composition of exoplanet and brown dwarf atmospheres. He/she will be part of the ATMO team at Maison de la Simulation (numerical simulation lab of CEA) and will also work in collaboration with astrophysicists at the Department of Astrophysics at CEA and collaborators in the international scientific community. He/she will have the opportunity to work on production level HPC codes running on the most powerful supercomputers. 



2017_Tremblin_phd1_en.docx (583 Ko)

P. Tremblin, 2017-11-16