Adrien Kuntz - Three-body problem in General Relativity

mercredi 30 nov. 2022, 10:00 → 11:15 Europe/Paris

Salle Denisse (ex Atelier) (Paris)

ABSTRACT

 

Three-body systems are very common in the universe and it is likely that future gravitational-wave detectors will detect them and measure their parameters. I will introduce a new approach ("Effective Two-Body") perturbatively solving the motion of hierarchical three-body systems by relying on the existence of two expansion parameters: small velocities and large separation of the third body. I will show how this new EFT formulation allows to compute the relativistic Hamiltonian of three-body systems order-by-order, and I will present some applications to long-term evolution of three-body systems and waveform modelling.

10:00 → 11:15 Three-body problem in General Relativity

ABSTRACT

Three-body systems are very common in the universe and it is likely that future gravitational-wave detectors will detect them and measure their parameters. I will introduce a new approach ("Effective Two-Body") perturbatively solving the motion of hierarchical three-body systems by relying on the existence of two expansion parameters: small velocities and large separation of the third body. I will show how this new EFT formulation allows to compute the relativistic Hamiltonian of three-body systems order-by-order, and I will present some applications to long-term evolution of three-body systems and waveform modelling

Orateur: Prof. Adrien Kuntz (Scuola Normale Superiore, Pisa, Italy)