The sound of the event horizon
arXiv:2312.16249 · doi:10.1142/S0218271823420142
Abstract
During the ringdown phase of a gravitational signal emitted by a black hole, the least damped quasinormal frequency dominates. If modifications to Einstein's theory induce noticeable deformations of the black-hole geometry only near the event horizon, the fundamental mode remains largely unaffected. However, even a small change near the event horizon can significantly impact the first few overtones, providing a means to probe the geometry of the event horizon. Overtones are stable against small deformations of spacetime at a distance from the black hole, allowing the event horizon to be distinguished from the surrounding environment. In contrast to echoes, overtones make a much larger energy contribution. These findings open up new avenues for future observations.
Honorable mention of the Gravity Research Foundation 2023 Awards for Essays on Gravitation
References in corpus (5)
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- Wormholes as Black Hole Foils
- Analysis of Ringdown Overtones in GW150914
- Gravitational wave signatures of black hole quasi-normal mode instability
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Cited by in corpus (12)
- Probing the Effective Quantum Gravity via Quasinormal Modes and Shadows of Black Holes
- Infinite tower of higher-curvature corrections: Quasinormal modes and late-time behavior of D-dimensional regular black holes
- Transition from Regular Black Holes to Wormholes in Covariant Effective Quantum Gravity: Scattering, Quasinormal Modes, and Hawking Radiation
- Overtones of black holes via time-domain integration
- Long-lived quasinormal modes, grey-body factors and absorption cross-section of the black hole immersed in the Hernquist galactic halo
- Regular Black Holes from Proper-Time flow in Quantum Gravity and their Quasinormal modes, Shadow and Hawking radiation
- Time Evolution of Black Hole Perturbations in Quadratic Gravity
- Quantum gravitational corrections to the Schwarzschild spacetime and quasinormal frequencies
- Overtones' outburst and Hawking evaporation of Kazakov-Solodukhin quantum corrected black hole
- Overtones' outburst of asymptotically AdS black holes
- Overtones behavior of higher dimensional black holes in the Einstein-Gauss-Bonnet gravity
- Massive fields affected by echoes: New physics vs. astrophysical environment