Résumé / Abstract Seminaire_GReCO

"The motion of small objects in curved spacetime: An introduction to gravitational self-force"

Adam Pound
School Mathematics, Univ. Southampton (Southampton, Royaume-Uni)

The gravitational self-force describes the effect of a small object's gravitational field on its own motion. Incorporating this effect with high accuracy is essential in modelling binary inspirals with extreme mass ratios. It has also proven to be an important tool for improving post-Newtonian and effective-one-body models. I outline the foundations of the self-force in perturbation theory, focusing on methods of matched asymptotic expansions, in which one accounts for the finite size of the small object. I then discuss recent results for the self-force at second order in perturbation theory. These second-order results promise to be sufficiently accurate to extract extreme-mass-ratio inspiral parameters from detected waveforms, and they can be used to push the perturbative model toward intermediate and comparable mass ratios.

lundi 18 novembre 2013 - 11:00
Salle des séminaires François Arago,
Institut d'Astrophysique de Paris

Page web du séminaire / Seminar's webpage