Projects

These are things I'm working on. Not all of these will be published. Please email me at jredondo [at] princeton [dot] edu if you are interested in any of them or would like to discuss further.

• Black Hole Lab A playground with visualizations of black hole quasinormal modes, gravitational waves emitted when particles fall into black holes, and other stuff I find useful to gain intuition. Continuously under construction.

  Quasinormal modes Frequencies, angular structure, and radial structure of the QNMs of a Kerr black hole. Plunges GW emission from generic plunges into a spinning black hole. Quadratic scattering Two waves in, a third one out: the quadratic coupling of a Schwarzschild black hole.
• Hierarchical triples near supermassive black holes in numerical relativity with Giuseppe Ficarra, João Santos, Vitor Cardoso Mergers of hierarchical triples using Numerical Relativity. 0 / 3
• Quadratic Green's function with Naritaka Oshita, Daiki Saito Structure of the excitation of second-order perturbations, from a Green function approach. 2 / 2
• Second-order perturbations of Kerr–Newman with David Pereñiguez Second-order dynamics of charged, rotating black holes. Coupling between electromagnetic and gravitational modes, and dynamics near extremality. 28 / 31
• Dynamical tides: GW scattering off neutron stars Compute phase-shift and reflectivity of GWs scattered by realistic neutron stars, and matching to dynamical tides. 8 / 12
• Measuring QNMs with Sophia Yi When observing loud ringdown signals, how many quasinormal modes are (information-theoretically) measurable? 23 / 30