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SUMMARY:Gravitational waves and the two-body problem in general relativity
  - Luc Blanchet (GReCO\, Institut d'Astrophysique de Paris)
DTSTART:20171110T130000Z
DTEND:20171110T140000Z
UID:TALK94537@talks.cam.ac.uk
CONTACT:Michalis Agathos
DESCRIPTION:The gravitational wave detectors LIGO/VIRGO have discovered th
 e\nsignals generated by the coalescence of binary black holes at\nastronom
 ical distances. The theoretical and numerical works on the\ntwo-body probl
 em in general relativity play a very important role when\ndeciphering and 
 interpreting the gravitational wave signals. In this\ntalk\, after a gener
 al review on gravitational waves and the problem\nof motion\, we shall pre
 sent the state-of-the-art on approximation methods\nin general relativity\
 , such as the famous post-Newtonian expansion\,\nwhich is an expansion whe
 n the orbital velocity of the black holes\nis small with respect to the sp
 eed of light. We shall show how useful\nis this approximation for the rece
 nt GW detections\, and discuss the\nlatest developments in this field.
LOCATION:Pavilion B Potter Room (B1.19)
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