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Spin-perturbed orbits near black holes

Pondělí, 18.02.2019 14:00

Přednášející: Vojtech Witzany (Astronomical Institute of the Czech Academy of Sciences)
Místo: Seminární místnost č. 226, FZÚ AV ČR, Pod Vodárenskou věží 1, Praha 8
Jazyk: Angličtina
Pořadatelé: Oddělení teorie a fenomenologie částic
A compact stellar mass object inspiralling onto a massive black hole deviates from geodesic motion due to radiation-reaction forces as well as finite-size effects. Such deviations need to be included with sufficient precision into wave-form models for the upcoming space-based gravitational-wave detector LISA. I will present the formulation and solution of the Hamilton-Jacobi equation of a generic geodesic in Kerr space-time perturbed by the spin-curvature coupling, the leading order finite-size effect. In return, this solution allows to compute a number of observables such as the turning points of the orbits as well as the fundamental frequencies of motion. These results essentially solve the question of conservative finite-size effects in extreme mass ratio inspirals.