Search results for "perturbation: scalar"

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Pseudospectrum of Reissner-Nordström black holes: Quasinormal mode instability and universality

2021

Black hole spectroscopy is a powerful tool to probe the Kerr nature of astrophysical compact objects and their environment. The observation of multiple ringdown modes in gravitational waveforms could soon lead to high-precision gravitational spectroscopy, so it is critical to understand if the quasinormal mode spectrum is stable against perturbations. It was recently shown that the pseudospectrum can shed light on the spectral stability of black hole quasinormal modes. We study the pseudospectrum of Reissner-Nordstr\"om spacetimes and we find a spectral instability of scalar and gravitoelectric quasinormal modes in subextremal and extremal black holes, extending similar findings for the Sch…

star: compactspace-time: Schwarzschildblack hole: Reissner-NordstroemScalar (mathematics)[PHYS.MPHY]Physics [physics]/Mathematical Physics [math-ph]01 natural sciencesGeneral Relativity and Quantum CosmologyGravitationGeneral Relativity and Quantum Cosmology0103 physical sciencesQuasinormal mode010306 general physicsperturbation: gravitationMathematical PhysicsMathematical physicsPseudospectrumPhysicsSpacetime010308 nuclear & particles physicsHorizonquasinormal modegravitational radiationblack hole: stabilityMathematics::Spectral Theorystabilityblack hole: quasinormal modequasinormal mode: spectrumBlack holeperturbation: scalarwave: model[PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc]Schwarzschild radius

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