Ergoregion instability: The hydrodynamic vortex
arXiv:1405.4038 · doi:10.1103/PhysRevD.89.124008
Abstract
Four-dimensional, asymptotically flat spacetimes with an ergoregion but no horizon have been shown to be linearly unstable against a superradiant-triggered mechanism. This result has wide implications in the search for astrophysically viable alternatives to black holes, but also in the understanding of black holes and Hawking evaporation. Here we investigate this instability in detail for a particular setup which can be realized in the laboratory: the {\it hydrodynamic vortex}, an effective geometry for sound waves, with ergoregion and without an event horizon.
10 pages, 8 figures, 2 tables
References in corpus (17)
- Quasinormal modes of black holes and black branes
- Acoustic black holes: horizons, ergospheres, and Hawking radiation
- Superradiant instabilities in astrophysical systems
- Superradiant instabilities of rotating black holes in the time domain
- Ergoregion instability of ultra-compact astrophysical objects
- Quasinormal modes and classical wave propagation in analogue black holes
- Gravitational wave signatures of the absence of an event horizon. I. Nonradial oscillations of a thin-shell gravastar
- Radiation from the non-extremal fuzzball
- On the ergoregion instability in rotating gravastars
- Quasinormal modes of maximally charged black holes
- Late-Time Tails of Wave Propagation in Higher Dimensional Spacetimes
- Black Holes and Beyond
- Black holes in a box: towards the numerical evolution of black holes in AdS
- Superradiance from BEC vortices: a numerical study
- Black hole bombs and explosions: from astrophysics to particle physics
- Superradiant scattering from a hydrodynamic vortex
- Quasinormal modes and Regge poles of the canonical acoustic hole
Cited by in corpus (26)
- Testing the nature of dark compact objects: a status report
- Light rings as observational evidence for event horizons: long-lived modes, ergoregions and nonlinear instabilities of ultracompact objects
- Numerical study of superradiant instability for charged stringy black hole-mirror system
- A proof of Friedman's ergosphere instability for scalar waves
- Ergoregion instabilities in rotating two-dimensional Bose--Einstein condensates: new perspectives on the stability of quantized vortices
- Acoustic clouds: standing sound waves around a black hole analogue
- Scalar clouds in charged stringy black hole-mirror system
- Waves on a vortex: rays, rings and resonances
- On the instability of ultracompact horizonless spacetimes
- Understanding superradiant phenomena with synthetic vector potentials in atomic Bose-Einstein condensates
- Onset of superradiant instabilities in the hydrodynamic vortex model
- Quasinormal modes of the polytropic hydrodynamic vortex
- Numerical Relativity and High Energy Physics: Recent Developments
- Synchronized stationary clouds in a static fluid
- Ergoregion instability of a rotating quantum system
- Dissipative Quantum Vortices and Superradiant Scattering
- Trapped Free Surface Waves for a Lamb-Oseen Vortex Flow
- Superradiant phononic emission from the analog spin ergoregion in a two-component Bose-Einstein condensate
- Marginally stable resonant modes of the polytropic hydrodynamic vortex
- Analog rotating black holes in a magnetohydrodynamic inflow
- Energy bounds and ergoregion instability in Einstein-Maxwell-Scalar field models
- Ergoregion instability in bosonic stars: scalar mode structure, universality, and weakly nonlinear effects
- Ergoregion instability in a fluid with vorticity
- Analytical investigation of wave absorption by a rotating black hole analogue
- On the analogy between black holes and bathtub vortices
- Nonlinear evolution of the ergoregion instability: Turbulence, bursts of radiation, and black hole formation