Tokyo Metropolitan University
October 28, 2026 02:00 PM
Abstract:
Gravitational-wave observations offer new opportunities to study wave propagation in the strong gravitational fields of black holes. Near a rotating black hole, this propagation involves both wave effects and interactions between the spin-2 nature of gravitational waves and the background curvature. After a brief introduction to the Teukolsky formalism, I will discuss gravitational waves from a localized source lensed by a Kerr black hole, focusing on helicity-dependent features in the amplification spectrum. I will also discuss possible connections with resonant excitation of quasinormal modes.
References:
[1] K. Kubota, S. Arai, H. Motohashi, and S. Mukohyama, Phys. Rev. D 110, 124011 (2024), [arXiv:2408.03289].
[2] H. Motohashi, Phys. Rev. Lett. 134, 141401 (2025), [arXiv:2407.15191].
I will share the zoom link later.
