Radiation processes in the vicinity of non-Schwarzschild and non-Kerr black holes
arXiv:1210.8430 · doi:10.1103/PhysRevD.87.024044
Abstract
Usually alternative theories of gravity imply deviations from the well-known Kerr space-time, a model of an isolated black hole in General Relativity. In the dominant order, the deformed Kerr metric, free of closed time-like curves outside the event horizon, has been suggested recently by Johannsen and Psaltis. It has a single deformation parameter which is not constrained by the current observations, allowing, thereby, for a kind of unified and simple phenomenological description of black holes in various theories of gravity. Here we consider a number of classical and quantum phenomena of radiation in the vicinity of such deformed Schwarzschild-like and Kerr-like black holes: spiralling of particles into black holes, decay of fields propagating in the black hole's background, Hawking radiation. In particular, we calculate some quantitative characteristics of the above phenomena, such as the binding energy of particles, quasinormal modes, late-time tails of fields of various spin, intensity of Hawking radiation. The binding energy released when a particle goes over from a given stable orbit in the equatorial plane to the innermost stable one is calculated for such non-Kerr black holes. Due to inseparability of the wave equations in the general case, the perturbations and stability of scalar, Dirac, and electromagnetic fields are analyzed for vanishing rotation only. The dependence of the radiation phenomena on the deformation parameter is discussed.
arXiv comment12 pages, 5 figures
References in corpus (35)
- Quasinormal modes of black holes: from astrophysics to string theory
- Quasinormal behavior of the D-dimensional Schwarzshild black hole and higher order WKB approach
- Late-Time Behavior of Stellar Collapse and Explosions: I. Linearized Perturbations
- A Metric for Rapidly Spinning Black Holes Suitable for Strong-Field Tests of the No-Hair Theorem
- Master equations for perturbations of generalised static black holes with charge in higher dimensions
- Mapping spacetimes with LISA: inspiral of a test-body in a `quasi-Kerr' field
- Instabilities of wormholes and regular black holes supported by a phantom scalar field
- Slowly rotating black holes in alternative theories of gravity
- Quasinormal Modes of Bardeen Black Hole: Scalar Perturbations
- A code to compute the emission of thin accretion disks in non-Kerr space-times and test the nature of black hole candidates
- Testing the No-Hair Theorem with Observations in the Electromagnetic Spectrum: I. Properties of a Quasi-Kerr Spacetime
- How to observe a non-Kerr spacetime
- Instability of higher dimensional charged black holes in the de-Sitter world
- Scalar field evolution in Gauss-Bonnet black holes
- Passage of radiation through wormholes of arbitrary shape
- Tests of General Relativity in the Strong Gravity Regime Based on X-Ray Spectropolarimetric Observations of Black Holes in X-Ray Binaries
- Quasinormal modes, scattering and Hawking radiation of Kerr-Newman black holes in a magnetic field
- Testing the Kerr-nature of stellar-mass black hole candidates by combining the continuum-fitting method and the power estimate of transient ballistic jets
- Holographic conductivity of zero temperature superconductors
- Gravitational stability of simply rotating Myers-Perry black holes: tensorial perturbations
- Late time tails of the massive vector field in a black hole background
- Dirac Quasinormal modes of Schwarzschild black hole
- Direct imaging rapidly-rotating non-Kerr black holes
- Attempt to find a correlation between the spin of stellar-mass black hole candidates and the power of steady jets: relaxing the Kerr black hole hypothesis
- Strong gravitational lensing by a rotating non-Kerr compact object
- Greybody factors in a rotating black-hole background-II : fermions and gauge bosons
- Particle motion around magnetized black holes: Preston-Poisson space-time
- High overtones of Dirac perturbations of a Schwarzschild black hole
- Can an astrophysical black hole have a topologically non-trivial event horizon?
- Properties of a thin accretion disk around a rotating non-Kerr black hole
- Decay of Dirac Massive Hair in the Background of Spherical Black Hole
- Rotating non-Kerr black hole and energy extraction
- Strong Gravitational Lensing of Quasi-Kerr Compact Object with Arbitrary Quadrupole Moments
- Motion of charged particles and quasinormal modes around the magnetically and tidally deformed black hole
- Object picture, quasinormal modes and late time tails of fermion perturbations in stringy black hole with U(1) charges
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- Quasinormal modes, scattering and Hawking radiation in the vicinity of Einstein-dilaton-Gauss-Bonnet black hole
- Systematic Study of Event Horizons and Pathologies of Parametrically Deformed Kerr Spacetimes
- Axisymmetric black holes allowing for separation of variables in the Klein-Gordon and Hamilton-Jacobi equation
- Hawking radiation of non-Schwarzschild black holes in higher derivative gravity: a crucial role of grey-body factors
- Disformal transformation of stationary and axisymmetric solutions in modified gravity
- Strong gravitational lensing by a Konoplya-Zhidenko rotating non-Kerr compact object
- Higher dimensional non-Kerr black hole and energy extraction
- Understanding Gravitational Entropy of Black Holes: A New Proposal via Curvature Invariants
- Energy extraction from a Konoplya-Zhidenko rotating non-Kerr black hole
- Scattering of massless fermions by Schwarzschild and Reissner-Nordström black holes
- Computing spectral shifts for Johannsen-Psaltis black holes
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