Strong Gravity research at Perimeter Institute is devoted to understanding both the theoretical and observational aspects of systems in which gravity is very strong (i.e., spacetime is highly curved or dynamical],. On one hand, this means studying extreme astrophysical systems, like black holes and neutron stars, as well as making and testing predictions for existing and forthcoming gravitational wave detectors, electromagnetic telescopes, and particle astrophysics experiments. On the other hand, it also includes a range of nonastrophysical topics, such as the instabilities of higherdimensional black holes or the dynamics of stronglycoupled quantum field theories (via holography). The goal of strong gravity researcher is to test the validity of Einstein's theory of gravity, constrain proposed alternatives, understand the most extreme astrophysical systems, and investigate the ways in which highly curved or dynamical spacetimes are linked with a range of other problems in fundamental physics.
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The Future of Numerical Relativity: Gravitational Memory, BMS Frames, and More
Keefe Mitman California Institute of Technology (Caltech)

On the modeling of black hole ringdown
Naritaka Oshita Kyoto University

Symmetries of Black Hole Perturbation Theory
Adam Solomon McMaster University

: From black holes to the Big Bang: astrophysics and cosmology with gravitational waves and their electromagnetic counterparts
Andrea Biscoveanu Massachusetts Institute of Technology (MIT)

On the fate of the LR instability
Carlos Herdeiro Universidad de Aveiro

Nuclear Astrophysics: Unknown Knowns
Isaac Legred California Institute of Technology (Caltech)

Measuring the distribution of binary black hole spins
Javier Roulet California Institute of Technology (Caltech)

Quasinormalmode filters and their impacts on future blackhole spectroscopy
Sizheng Ma Perimeter Institute for Theoretical Physics