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Reference : UMR8102-ERIGOU-001
Workplace : MEUDON
Date of publication : Monday, November 15, 2021
Type of Contract : FTC Scientist
Contract Period : 24 months
Expected date of employment : 1 March 2022
Proportion of work : Full time
Remuneration : Between 2743€ et 3896 € monthly before taxes depending on experience
Desired level of education : 5-year university degree
Experience required : Indifferent
The recruited person shall study the relationship between asymptotic symmetries of spacetime and gravitational waves emitted by binary systems, such those already detected by LIGO and Virgo. This amounts to deriving the astrophysical consequences of the flux conservation laws associated with the symmetries of the BMS (Bondi-van der Brug-Metzner-Sachs) group, as it has been done for flux conservation laws associated with the symmetries of the Poincaré group. The aim is to obtain observational signatures of the BMS group on gravitational wave forms.
- deriving the relation between the BMS charges and the source multipolar moments via post-Newtonian and post-Minkowskian techniques
- getting a system of coupled differential equations governing the evolution of the source parameters (flux conservation laws associated to the BMS symmetries)
- solving these equations via analytic and/or numerical methods
- deducing the observable signatures
- doctorate (PhD) in physics or mathematics by the time the contract starts
- good knowledge of general relativity
- good knowledge of gravitational wave sources
- good knowledge of the BMS (Bondi-van der Brug-Metzner-Sachs) group
The recruited person will work in the Relativity and Compact Object team of Laboratoire Univers et Théories (LUTH), in the Meudon campus of Observatoire de Paris. LUTH is a joint research unit of CNRS, Observatoire de Paris-PSL and Université de Paris. The scientific activity of the laboratory is mainly focused on the theoretical study of astrophysical systems and their modeling, with a strong numerical expertise.
The Relativity and Compact Objects team works on the different astrophysical situations where gravity is intense and described by Einstein's theory. It consists mainly in the study of compact objects as source of gravitational waves and in strong field tests of gravity. It consists of six faculty members (Laura Bernard, Eric Gourgoulhon, Philippe Grandclément, Alexandre Le Tiec, Jérôme Novak and Micaela Oertel), and several graduate students and postdoctoral fellows. The postdoctoral researcher will also benefit from the very large gravity, astrophysics and theoretical physics communities in the Paris region.
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