Speaker
Dr.
Carlo Heissenberg
(Institut de Physique Théorique (IPhT, Saclay))
Description
The direct detection of gravitational waves has put the relativistic
two-body problem in the spotlight and stimulated progress in
perturbative approaches that provide analytic insight into its dynamics. Two strategies that have been witnessing interesting developments to this end are the ones based on scattering amplitudes, which apply to binary scatterings at large impact parameter, and on black-hole perturbation theory, which applies to extreme-mass-ratio binaries. In this talk, I will discuss how these two methods play complementary roles, and how they can be employed to calculate the gravitational perturbations induced by scatterings of black holes both at null infinity and close to the event horizons.
