Numerical study of superradiant instability for charged stringy black hole–mirror system
Ran Li,Junkun Zhao +1 more
TLDR
In this paper, the superradiant instability of charged massless scalar field in the background of a charged stringy black hole with mirror-like boundary condition was studied and compared with the previous analytical result.About:
This article is published in Physics Letters B.The article was published on 2015-01-05 and is currently open access. It has received 55 citations till now. The article focuses on the topics: Charged black hole & Extremal black hole.read more
Citations
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Numerical methods for finding stationary gravitational solutions
TL;DR: In this paper, the mathematical foundations and a practical guide for the numerical solution of gravitational boundary value problems are explained and several tools and tricks that have been useful throughout the literature are presented.
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Kerr black holes with self-interacting scalar hair: hairier but not heavier
TL;DR: In this paper, Herdeiro et al. investigated how self-interaction affects Kerr black holes with scalar hair (KBHsSH) and showed that these same selfinteractions affect Kerr black hole spacetimes may become considerably hairier, but the trapped regions cannot become much heavier.
BookDOI
Superradiance -- the 2020 Edition
TL;DR: Black-hole superradiance has played a prominent role in optics, quantum mechanics and especially in relativistic and astrophysics as discussed by the authors, and has been studied in the laboratory by devising analog models of gravity, and might even provide a holographic description of spontaneous symmetry breaking.
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Spinning Kerr black holes with stationary massive scalar clouds: the large-coupling regime
Shahar Hod,Shahar Hod +1 more
TL;DR: In this paper, the Klein-Gordon wave equation for stationary massive scalar fields linearly coupled to spinning Kerr black holes was studied analytically and a compact formula for the discrete spectrum of scalar field masses was derived.
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Charged scalar perturbations around Garfinkle–Horowitz–Strominger black holes
TL;DR: In this paper, the authors examined the stability of the Garfinkle-Horowitz-Strominger (GHS) black hole under charged scalar perturbations and showed that the GHS black hole is always stable.
References
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Rotating Black Holes: Locally Nonrotating Frames, Energy Extraction, and Scalar Synchrotron Radiation
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Black Holes and Membranes in Higher Dimensional Theories with Dilaton Fields
TL;DR: In this article, the authors consider scale invariant theories which couple gravity to Maxwell fields and antisymmetric tensor fields with a dilaton field, and they exhibit in a unified way solutions representing black hole, space-time membrane, vortex and cosmological solutions.
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Charged black holes in string theory
TL;DR: A family of solutions to low-energy string theory representing static, spherically symmetric charged black holes is described, and the extremal charged "black holes" are found to be geodesically complete spacetimes with no event horizons and no singularities.
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Floating orbits, superradiant scattering, and the black-hole bomb.
TL;DR: In this article, it was shown that super-radiant scattering can also be used to extract rotational energy from a rotating hole, and that a particle radiatively extracts energy from the hole at the same rate as it radiates energy to infinity; thereby it experiences zero net radiation reaction.
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Klein-gordon equation and rotating black holes
TL;DR: In this paper, the Klein-Gordon equation for a scalar field of mass in the geometry of a rotating black hole was analyzed and it was shown that in the limit of the particle Compton wavelength much larger than the size of the black hole, the scalar fields is unstable with an $e$-folding time of