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Reference : UMR8109-SYLDES-003
Workplace : MEUDON
Date of publication : Wednesday, January 02, 2019
Type of Contract : FTC Scientist
Contract Period : 18 months
Expected date of employment : 1 April 2019
Proportion of work : Full time
Remuneration : Gross salary from 2600 to 3007 euros depending on experience
Desired level of education : PhD
Experience required : 1 to 4 years
The e-PYTHEAS ANR team obtained new ab initio molecular line lists in the 1-17 μm wavelength region for hydrocarbons and their isotopologues such as 12CH4, 13CH4, CH3D, C2H2, C2H4 and C2H6 up to 2500 K (http://theorets.univ-reims.fr/molecules). The main goal of the postdoc project is to analyze the effects of these new line lists on transit and emission spectra of warm/hot exoplanets using new radiative transfer models and to estimate the detectability of these molecules by current (HST, VLT etc.) and future (JWST, ARIEL, ELT) ground or space-borne telescopes.
Transit and emission spectra will be produced at low and high spectral resolution using a 1-D radiative-convective model developed at LESIA (Exo-REM). The candidate will incorporate the new molecular opacities in the atmospheric model and adapt Exo-REM to irradiated planets and transit spectroscopy. He/she will afterwards apply it to brown dwarfs and young giant exoplanets observed by direct imaging (e.g. VLT/SPHERE) and to warm/hot transiting exoplanets observed by e.g. Spitzer or HST. He/she will also be involved in the preparation of ESA's M4 mission ARIEL in the Cosmic Vision program (https://ariel-spacemission.eu/).
PhD in physics, astronomy or a related discipline
Expertise in radiative transfer and molecular spectroscopy
Knowledge of FORTRAN language
Good command of written and spoken English
LESIA, a department of the Observatoire de Paris and laboratory of the CNRS, is one of the largest French research laboratories in astrophysics. Located on the Meudon site of the Observatoire de Paris, it includes more than 240 agents, 130 of which have permanent positions.
The successful candidate will work closely with Dr. Benjamin Charnay and Dr. Bruno Bézard. He/she will also interact with the other members of the e-PYTHEAS ANR team, including A. Coustenis, P. Drossart, T. Encrenaz (LESIA), P. Lavvas (GSMA, France) and G. Tinetti (UCL, UK), as well as with spectroscopists in the team based in Dijon, Grenoble, Reims and Rennes.
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