We study black holes, gravitational waves and strong-field gravity — from the mathematics of perturbed spacetimes to the signals measured by LIGO, Virgo and the detectors of the next decade.
How quasinormal modes are excited: the ringdown as a spectral filter of the initial perturbation, the suppression of late-time tails, and ringdown tests of general relativity.
The imprint of gas and dark-matter clouds on extreme-mass-ratio inspirals observed by LISA, from gravitational atoms to the Little Red Dots.
Oscillation modes of viscous neutron stars in a causal and stable theory of relativistic hydrodynamics, and new viscosity-driven modes.
Time-domain perturbation solvers, quasinormal-mode computations, numerical relativity, gravitational-wave data analysis and physics-informed neural networks.