Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series LPT-MAG
Subjects hep-ph
Date Tuesday 14 November 2017
Time 14:00
Institute LPT
Seminar Room 114
Speaker's Last Name Blanchet
Speaker's First Name Luc
Speaker's Email Address
Speaker's Institution IAP
Title Gravitational waves and the two-body problem in general relativity
Abstract The gravitational wave detectors LIGO/VIRGO have discovered the signals generated by the coalescence of compact binary systems (made of black holes or neutron stars) at astronomical distances. The theoretical and numerical works on the two-body problem in general relativity play a crucial role when deciphering and interpreting the gravitational wave signals. In this talk, after a general review on gravitational waves and the problem of motion, we shall present the state-of-the-art on approximation methods in general relativity, such as the famous post- Newtonian expansion, which is an expansion when the orbital velocity of the compact objects is small with respect to the speed of light. We shall show how important is this approximation for the GW detections, notably the recent binary neutron star event, and discuss the latest developments in the field.
arXiv Preprint Number
Comments P-cube joint LPT/LPTHE/IPhT seminar. Followed by journal club discussing gravitational wave constraints on modified gravity theories.
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