scholarly journals The quasi-normal modes of charged scalar fields in Kerr-Newman black hole and its geometric interpretation

2015 ◽  
Vol 2015 (11) ◽  
Author(s):  
Peng Zhao ◽  
Yu Tian ◽  
Xiaoning Wu ◽  
Zhao-Yong Sun
Keyword(s):  
Black Hole ◽  
Normal Modes ◽  
Scalar Fields ◽  
Geometric Interpretation ◽  
Charged Scalar ◽  
Newman Black Hole

RESONANT FREQUENCIES OF CHARGED SCALAR AND DIRAC FIELDS IN KERR–NEWMAN BLACK-HOLE SPACE–TIME

2007 ◽  
Vol 16 (01) ◽  
pp. 81-92 ◽  
Author(s):  
JILIANG JING ◽  
QIYUAN PAN ◽  
XI HE
Keyword(s):  
Black Hole ◽  
Imaginary Part ◽  
Space Time ◽  
Charged Scalar ◽  
Resonant Frequencies ◽  
Dirac Fields ◽  
Quantum Numbers ◽  
Newman Black Hole

The resonant frequencies of the charged scalar and Dirac fields in the near extremal Kerr–Newman black hole are studied. It is found that the expressions of the resonant frequencies for the charged scalar and Dirac fields with purely real δ are different because the parameters qs are different and the imaginary part has opposing symbol for the two fields. It is also shown that the long-lived resonant frequencies depend on the angular quantum numbers l and m.

scholarly journals Normal modes and the no zero mode theorem of scalar fields in BTZ black hole spacetime

2008 ◽  
Vol 25 (14) ◽  
pp. 145016 ◽  
Author(s):  
Masakatsu Kenmoku ◽  
Maiko Kuwata ◽  
Kazuyasu Shigemoto
Keyword(s):  
Black Hole ◽  
Zero Mode ◽  
Normal Modes ◽  
Scalar Fields ◽  
Btz Black Hole ◽  
Black Hole Spacetime

Quasi-normal modes of the Kerr-Newman black hole

1993 ◽  
Vol 108 (9) ◽  
pp. 991-998 ◽  
Author(s):  
K. D. Kokkotas
Keyword(s):  
Black Hole ◽  
Normal Modes ◽  
Newman Black Hole

scholarly journals Boson stars and solitons confined in a Minkowski box

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Oscar J. C. Dias ◽  
Ramon Masachs ◽  
Paul Rodgers
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Ground State ◽  
Normal Modes ◽  
Junction Conditions ◽  
Mass Limit ◽  
Boson Stars ◽  
Charged Scalar ◽  
Charged Scalar Field ◽  
Scalar Hair

Abstract We consider the static charged black hole bomb system, originally designed for a (uncharged) rotating superradiant system by Press and Teukolsky. A charged scalar field confined in a Minkowski cavity with a Maxwell gauge field has a quantized spectrum of normal modes that can fit inside the box. Back-reacting non-linearly these normal modes, we find the hairy solitons, a.k.a boson stars (depending on the chosen U(1) gauge), of the theory. The scalar condensate is totally confined inside the box and, outside it, we have the Reissner-Nordström solution. The Israel junction conditions at the box surface layer determine the stress tensor that the box must have to confine the scalar hair. Some of these horizonless hairy solutions exist for any value of the scalar field charge and not only above the natural critical charges of the theory (namely, the critical charges for the onset of the near-horizon and superradiant instabilities of the Reissner-Nordström black hole). However, the ground state solutions have a non-trivial intricate phase diagram with a main and a secondary family of solitons (some with a Chandrasekhar mass limit but others without) and there are a third and a fourth critical scalar field charges where the soliton spectra changes radically. Most of these intricate properties are not captured by a higher order perturbative analysis of the problem where we simply back-react a normal mode of the system.

scholarly journals Superradiant instability of D-dimensional Reissner–Nordström-anti-de Sitter black hole mirror system

2017 ◽  
Vol 26 (13) ◽  
pp. 1750141 ◽  
Author(s):  
Yang Huang ◽  
Dao-Jun Liu ◽  
Xin-Zhou Li
Keyword(s):  
Black Hole ◽  
Threshold Value ◽  
Scalar Fields ◽  
Scalar Perturbation ◽  
De Sitter ◽  
Charged Scalar ◽  
Dimensional Spacetime ◽  
Higher Dimensional ◽  
The Stability ◽  
Degree Of Instability

In this paper, a detailed analysis for superradiant stability of the system composed by a [Formula: see text]-dimensional Reissner–Nordström-anti-de Sitter (RN-AdS) black hole and a reflecting mirror under charged scalar perturbations are presented in the linear regime. It is found that the stability of the system is heavily affected by the mirror radius as well as the mass of the scalar perturbation, AdS radius and the dimension of spacetime. In a higher dimensional spacetime, the degree of instability of the superradiant modes will be severely weakened. Nevertheless, the degree of instability can be magnified significantly by choosing a suitable value of the mirror radius. Remarkably, when the mirror radius is smaller than a threshold value the system becomes stable. We also find that massive charged scalar fields cannot trigger the instabilities in the background of [Formula: see text]-dimensional asymptotically flat RN black hole. For a given scalar charge, a small RN-AdS black hole can be superradiantly unstable, while a large one may be always stable under charged scalar field with or without a reflecting mirror. We also show that these results can be easily expounded and understood with the help of factorized potential analysis.

scholarly journals Charged scalar quasi-normal modes for higher-dimensional Born–Infeld dilatonic black holes with Lifshitz scaling

2020 ◽  
Vol 80 (2) ◽  
Author(s):  
S. Sedigheh Hashemi ◽  
Mahdi Kord Zangeneh ◽  
Mir Faizal
Keyword(s):  
Black Hole ◽  
Black Hole Solution ◽  
Large Extra Dimensions ◽  
Normal Modes ◽  
Asymptotic Iteration Method ◽  
Positive Potential ◽  
Charged Scalar ◽  
Higher Dimensional ◽  
Dimensional Black Hole ◽  
Lifshitz Black Hole

Abstract We study quasi-normal modes for a higher dimensional black hole with Lifshitz scaling, as these quasi-normal modes can be used to test Lifshitz models with large extra dimensions. We analyze quasi-normal modes for higher dimensional dilaton-Lifshitz black hole solutions coupled to a non-linear Born–Infeld action. We will analyze the charged perturbations for such a black hole solution. We will first analyze the general conditions for stability analytically, for a positive potential. Then, we analyze this system for a charged perturbation as well as negative potential, using the asymptotic iteration method for quasi-normal modes.

Gravitational Waves

2018 ◽  
Author(s):  
Michele Maggiore
Keyword(s):  
Black Hole ◽  
Perturbation Theory ◽  
Gravitational Waves ◽  
Transfer Functions ◽  
Normal Modes ◽  
Cosmological Perturbation ◽  
Tests Of General Relativity ◽  
Pulsar Timing ◽  
Tensor Perturbations ◽  
Stochastic Backgrounds

A comprehensive and detailed account of the physics of gravitational waves and their role in astrophysics and cosmology. The part on astrophysical sources of gravitational waves includes chapters on GWs from supernovae, neutron stars (neutron star normal modes, CFS instability, r-modes), black-hole perturbation theory (Regge-Wheeler and Zerilli equations, Teukoslky equation for rotating BHs, quasi-normal modes) coalescing compact binaries (effective one-body formalism, numerical relativity), discovery of gravitational waves at the advanced LIGO interferometers (discoveries of GW150914, GW151226, tests of general relativity, astrophysical implications), supermassive black holes (supermassive black-hole binaries, EMRI, relevance for LISA and pulsar timing arrays). The part on gravitational waves and cosmology include discussions of FRW cosmology, cosmological perturbation theory (helicity decomposition, scalar and tensor perturbations, Bardeen variables, power spectra, transfer functions for scalar and tensor modes), the effects of GWs on the Cosmic Microwave Background (ISW effect, CMB polarization, E and B modes), inflation (amplification of vacuum fluctuations, quantum fields in curved space, generation of scalar and tensor perturbations, Mukhanov-Sasaki equation,reheating, preheating), stochastic backgrounds of cosmological origin (phase transitions, cosmic strings, alternatives to inflation, bounds on primordial GWs) and search of stochastic backgrounds with Pulsar Timing Arrays (PTA).

Sign in / Sign up

Export Citation Format

Share Document