Gravity fascinates me, especially when it is highly nonlinear. My work explores nonlinear effects in the relaxation of black holes. I’m also intrigued by how astrophysical environments might absorb, reflect, trap, or amplify gravitational waves. When I have more fun is when mathematics, numerics, and approximations come together to reveal new insights.

Below are some of my favorite recent papers. For the full list, see my profile in Spires or Google Scholar.

Favorite Papers

• Superradiant amplification by rotating viscous compact objects, JRY & V. Cardoso, pre-print.
• Perturbative and nonlinear analyses of gravitational turbulence in spacetimes with stable light rings, JRY & A. Cardenas-Avendaño, Phys. Rev. D 111 (2025) 12, 124009.
• The dynamical response of viscous objects to gravitational waves, V. Boyanov, V. Cardoso, K. Kokkotas & JRY, Phys. Rev. Lett. to appear.
• Ringdown of a dynamical spacetime, JRY, D.Pereñiguez & V. Cardoso, Phys. Rev. D 109 (2024) 4, 044048.
• Spin dependence of black hole ringdown nonlinearities, JRY, G. Carullo, J. Ripley, E. Berti & V. Cardoso, Phys. Rev. D 109 (2024) 10, L101503.

Recent Talks & Seminars

• 2025.05.28 - Nonlinear effects in perturbation theory @ QNM Workshop, IBS, Daejeon
• 2025.05.14 - The sound of black holes @ Nordic GW Meeting, Copenhagen
• 2025.04.22 - Nonlinear gravitational waves @ ACR Division Seminar, Albert Einstein Institute, Berlin
• 2025.03.12 - Turbulence of gravitational waves @ Distinguished Astrophysic Seminar, Los Alamos, NM

These are questions that keep me up at night...