Shadow and near-horizon characteristics of the acoustic charged black hole in curved spacetime

Abstract

In this paper, we first analyze the horizon structure of the acoustic charged black hole in curved spacetime, and then study its acoustic shadow as well as the near-horizon characteristics including the quasinormal modes (QNM) frequencies and analogue Hawking radiation. We find that the radius of the acoustic shadow for acoustic charged black hole is larger than that for Reissner-Nordström (RN) black hole, and both of them are suppressed by increasing the black hole charge because their related outer horizons become smaller. Then the QNM frequencies under scalar field perturbation and its eikonal limit are computed via numeric method and acoustic shadow, respectively. We find that the acoustic charged black hole is stable under the perturbation and the QNM frequencies are much weaker than that for the astrophysical black hole. Moreover, as the tuning parameter increases, the perturbation oscillates more mildly and its damping time becomes longer, while as the charge increases, the oscillation is enhanced slightly and the perturbation decays a little faster which is different from that in RN black hole. Finally, we numerically study the analogue Hawking radiation. We find that the grey-body factor and energy emission rate are suppressed by the angular number and the charge, but they do not monotonically depend on the tuning parameter in the acoustic charged black hole. The behavior of the energy emission rate affected by the parameters could be explained by the dependent behavior of the Hawking temperature. We expect that our results could shed light to the study of black holes in both theoretical and experimental perspectives.

Published version

References in corpus (23)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• Building an AdS/CFT superconductor
• First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
• First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole
• First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring
• First M87 Event Horizon Telescope Results. II. Array and Instrumentation
• First M87 Event Horizon Telescope Results. III. Data Processing and Calibration
• Higher order WKB formula for quasinormal modes and grey-body factors: recipes for quick and accurate calculations
• Observation of self-amplifying Hawking radiation in an analog black hole laser
• Are eikonal quasinormal modes linked to the unstable circular null geodesics?
• Analytical correspondence between shadow radius and black hole quasinormal frequencies
• Quasibound states of Schwarzschild acoustic black holes
• Quasinormal modes of charged fields around a Reissner-Nordström black hole
• Correspondence of eikonal quasinormal modes and unstable fundamental photon orbits for Kerr-Newman black hole
• Acoustic black holes in curved spacetime and emergence of analogue Minkowski metric
• Acoustic clouds: standing sound waves around a black hole analogue
• Optical analogues of black-hole horizons
• Acoustic black hole in Schwarzschild spacetime: quasi-normal modes, analogous Hawking radiation and shadows
• Back-reaction in canonical analogue black holes
• Analogue Gravity on a Superconducting Chip
• High-dimensional Schwarzschild black holes in scalar-tensor-vector gravity theory
• Particle Production in the Interiors of Acoustic Black Holes
• Quasinormal mode and stability of optical black holes in moving dielectrics

Cited by in corpus (10)

• Probing a nonlinear electrodynamics black hole with thin accretion disk, shadow and deflection angle with M87* and Sgr A* from EHT
• Quasiperiodic oscillations, weak field lensing and shadow cast around black holes in Symmergent gravity
• Testing Symmergent gravity through the shadow image and weak field photon deflection by a rotating black hole using the M87${}^{\ast }$ and Sgr. A${}^{\ast }$ results
• Black hole in quantum wave dark matter
• Photon regions, shadow observables and constraints from M87* of a charged rotating black hole
• Slowly-rotating curved acoustic black holes: Quasinormal modes, Hawking-Unruh radiation and quasibound states
• The shadow of regular black holes with asymptotically Minkowski core
• Quasinormal modes and Hawking radiation of a charged Weyl black hole
• Regular black holes with improved energy conditions and their analogues in fluids
• Hawking radiation and stability of the canonical acoustic black holes