Abstract The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders
about the fundamental theory of nature at play in the extreme gravity regime, where the …

Gravitational waves enable tests of general relativity in the highly dynamical and strong-field
regime. Using events detected by LIGO-Virgo up to 1 October 2019, we evaluate the …

The ever-increasing number of detections of gravitational waves (GWs) from compact
binaries by the Advanced LIGO and Advanced Virgo detectors allows us to perform ever …

Black hole spectroscopy is the program to measure the complex gravitational wave
frequencies of merger remnants, and to quantify their agreement with the characteristic …

Much of our physical intuition about black hole quasinormal modes in general relativity
comes from the eikonal/geometric optics approximation. According to the well-established …

The no-hair conjecture in general relativity (GR) states that the properties of an astrophysical
Kerr black hole (BH) are completely described by its mass and spin. As a consequence, the …

We study the stability of quasinormal modes (QNM) in asymptotically flat black hole
spacetimes by means of a pseudospectrum analysis. The construction of the Schwarzschild …

One of the most promising strategies to test gravity in the strong-field, large curvature regime
is gravitational spectroscopy: the measurement of black hole quasinormal modes from the …

Ground-based gravitational-wave detectors like Cosmic Explorer (CE) can be tuned to
improve their sensitivity at high or low frequencies by tuning the response of the signal …

Black hole (BH) spectroscopy has emerged as a powerful approach to extracting spacetime
information from gravitational wave (GW) observed signals. Yet, quasinormal mode (QNM) …