Séminaire / Seminar GReCO |
| « Post-Newtonian approach to spin-orbit effects in inspiralling compact binaries » |
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Sylvain Marsat |
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The upcoming new generation of ground-based detectors such as LIGO and VIRGO is likely to allow for the first direct detections of gravitational waves, opening a new window on the universe and on extreme events in the regime of strong-field gravity. Compact object mergers are the most promising sources for these detectors, as for the future space-based experiments. The faintness of the signal has driven a lot of effort to model it as accurately as possible, which is done using a combination of analytical and numerical methods.
In this talk, we will address the question of the analytical modelling of spin-orbit effects in the inspiral of compact binaries, within the post-Newtonian approach. From astrophysical observations, black holes spins are expected to be generically close to maximal, and they play an important role by causing orbital plane precession modulating the signal. We will present the formalism of point particles with spins and the post-Newtonian near-zone expansion method, and report the results recently obtained for the dynamics of the binary at next-to-next-to-leading order. We will conclude by prospects for the computation of gravitational waves emitted. |
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mercredi 22 mai 2013 - 11:00 Amphithéâtre Henri Mineur Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |