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Astronomy Seminar

Gravitational waves and the two-body problem in general relativity

Speaker: Prof. Luc Blanchet (Institut d'Astrophysique de Paris)
Date: Wednesday 8 November 2017
Time: 14:00
Venue: Queens Buildings N/3.28

The gravitational wave detectors LIGO/VIRGO have discovered the signals generated by the coalescence of binary black holes at astronomical distances. The theoretical and numerical works on the two-body problem in general relativity play a very important role when deciphering and interpreting the gravitational wave signals. In this talk, after a general review of the topic, we shall present the state-of-the-art on post-Newtonian (PN) methods in GR, applied to the gravitational waveform generated during the inspiralling phase of coalescing black hole binaries. In particular we discuss recent developments on the fourth post-Newtonian (4PN) approximation.