Gravity Seminar: Gravitational waveforms in general relativity and scalar-tensor theories, Laura Bernard, Observatoire de Paris

Since the first gravitational wave (GW) detection by the LIGO-Virgo collaboration, more than fifty GW signals from compact binary systems (made of black hole or neutron stars) have been detected. In the future, the LISA space-based interferometer and next generation detectors, such as the Einstein Telescope, will allow to test our gravitational paradigm with an unprecedented precision. One of the new challenge to analysis the forthcoming huge amount of data resides in the high precision modelling of GWs both in general relativity (GR) and beyond. In this talk, I will focus on the post-Newtonian method that is used to describe the inspiral phase of the coalescence of compact binary systems. After reviewing the multipolar – post Minkowskian – post Newtonian formalism and the state-of-the-art in GR, I will explain how such a formalism can be simply applied to scalar- tensor theories of gravity. In particular, I will focus on the main phenomenological differences from GR and present the latest developments, including the contribution from the scalar dipolar tidal effect.

https://uibuniversitat.zoom.us/j/82988691485.