Abstract The Einstein Telescope (ET), the European project for a third-generation
gravitational-wave detector, has a reference configuration based on a triangular shape …

The gravitational wave strain emitted by a perturbed black hole (BH) ringing down is
typically modeled analytically using first-order BH perturbation theory. In this Letter, we show …

In the analysis of a binary black hole coalescence, it is necessary to include gravitational self-
interactions in order to describe the transition of the gravitational wave signal from the …

Detecting gravitational waves from coalescing compact binaries allows us to explore the
dynamical, nonlinear regime of general relativity and constrain modifications to it. Some of …

Black hole spectroscopy with gravitational waves is an important tool to measure the mass
and spin of astrophysical black holes and to test their Kerr nature. Next-generation ground …

Recent studies have shown that quasinormal modes suffer from spectral instabilities, a frailty
of black holes that leads to disproportional migration of their spectra in the complex plane …

We introduce a bilinear form for Weyl scalar perturbations of Kerr. The form is symmetric and
conserved, and we show that, when combined with a suitable renormalization prescription …

The Laser Interferometer Space Antenna (LISA) will detect gravitational waves (GWs)
emitted by massive black hole binaries (MBHBs) in the low-frequency (∼ mHz) band. Low …

The ringdown signal emitted during a binary black hole coalescence can be modeled as a
linear superposition of the characteristic damped modes of the remnant black hole that get …

LISA, the Laser Interferometer Space Antenna, will usher in a new era in gravitational-wave
astronomy. As the first anticipated space-based gravitational-wave detector, it will expand …