Gravitational memory effects and the BMS freedoms exhibited at future null infinity have
recently been resolved and utilized in numerical relativity simulations. With this, gravitational …

The quasinormal mode spectrum of black holes plays a crucial role in the modeling of
postmerger ringdown signals. However, the spectrum is extremely sensitive to small …

The ringdown gravitational wave signal arising, eg, in the final stage of a black hole binary
merger, contains important information about the properties of the remnant and can …

The spectral amplitude of the merger-ringdown gravitational wave (GW) emitted by a
comparable mass-ratio black hole merger is modeled by the greybody factor of the remnant …

Quadratic quasinormal mode, generated at second order in black hole perturbation theory,
are a promising target for testing gravity in the nonlinear regime with next-generation …

A bstract General Relativity predicts the existence of quadratic quasi-normal modes at
second order in perturbation theory. Building on our recent work, we compute the …

We numerically investigate the imprints of gravitational radiation-reaction driven changes to
a black hole's mass and spin on the corresponding ringdown waveform. We do so by …

Oscillations of black hole spacetimes exhibit divergent behavior toward the bifurcation
sphere and spatial infinity. This divergence can be understood as a consequence of the …

The remnant black hole from a binary coalescence emits ringdown gravitational waves
characterized by quasi-normal modes, which depend solely on the remnant's mass and …

The remnant black hole from a binary coalescence emits ringdown gravitational waves
characterized by quasinormal modes, which depend solely on the remnant's mass and spin …