Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series APC-TH
Subjects hep-th
Date Tuesday 11 July 2017
Time 14:00
Institute APC
Seminar Room 483 A - Malevitch
Speaker's Last Name Marchand
Speaker's First Name Tanguy
Speaker's Email Address
Speaker's Institution APC, Université Paris Diderot
Title Post-Newtonian order gravitational radiation
Abstract Post-Newtonian theory enables us to predict the waveform of the gravitational waves emitted by a system of two compact objects coalescing in its inspiral phase. State-of-the-art works provide the phase of the expected signal up to 3.5PN (i.e. up to 1/c^7). Comparison with numerical relativity, as well as the promising evolution of gravitational wave detectors incite us to pursue this computation to a higher order. In our current attempt, we are reaching the phase of the signal at the 4.5PN order (i.e. 1/c^9). For this purpose, the flux emitted by such a system has to be known at 4.5PN. I will describe the so-called Blanchet-Damour-Iyer formalism that we're using, and show how it combines near-zone and far-zone results. I will focus on the 4.5PN coefficient in the flux for circular orbits due to specific non-local terms -called tails- that was computed recently [1]. [1] Marchand T., Blanchet L., Faye G. Class.Quant.Grav. 33 (2016) no.24, 244003
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