Echoes and quasinormal modes of asymmetric black bounces

Abstract

We study quasinormal modes and echoes of symmetric and asymmetric black bounce solutions generated by anisotropic fluids within the framework of general relativity. We derive the effective potential governing massless scalar fields and compute the corresponding quasinormal mode spectra using three independent methods: sixth-order WKB, Pöschl-Teller and time-domain evolution. Our results show that symmetric black bounce configurations with horizons yield a standard single-barrier potential, while horizonless solutions may exhibit multiple potential barriers that generate gravitational wave echoes. These echoes are sensitive to model parameters such as the fluid energy density and the regularizing parameter $a$ that defines the minimal $2$-sphere. The asymmetric models considered recover the Reissner-Nordström solution in their external region but can be bounded or unbounded in the inside, depending on the sign of a parameter. Both cases have similar qualitative properties as far as wave emission is concerned but show no echoes. This makes it very difficult to distinguish them from standard Reissner-Nordström configurations.

26 pages, 9 figures, 2 tables

References in corpus (36)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• The Confrontation between General Relativity and Experiment
• GW170814: A Three-Detector Observation of Gravitational Waves from a Binary Black Hole Coalescence
• Echoes of ECOs: gravitational-wave signatures of exotic compact objects and of quantum corrections at the horizon scale
• Novel black-bounce spacetimes: wormholes, regularity, energy conditions, and causal structure
• A novel family of rotating black hole mimickers
• Field sources for Simpson-Visser space-times
• Gravitational lensing in the Simpson-Visser black-bounce spacetime in a strong deflection limit
• Shadows and photon rings of regular black holes and geonic horizonless compact objects
• Gravitational lensing in a black-bounce traversable wormhole spacetime
• Analytical study of gravitational lensing in Kerr-Newman black-bounce spacetime
• Echoes of novel black-bounce spacetimes
• Photon rings as tests for alternative spherically symmetric geometries with thin accretion disks
• Quasinormal modes of a holonomy corrected Schwarzschild black hole
• Transition from Regular Black Holes to Wormholes in Covariant Effective Quantum Gravity: Scattering, Quasinormal Modes, and Hawking Radiation
• Charged black-bounce spacetimes: Photon rings, shadows and observational appearances
• On black bounce space-times in non-linear electrodynamics
• Black bounces in conformal Killing gravity
• Echoes from Asymmetric Wormholes and Black Bounce
• Quasinormal Ringing and Shadows of Black Holes and Wormholes in Dark Matter-Inspired Weyl Gravity
• Weak Deflection Angle, Hawking Radiation and Greybody Bound of Reissner-Nordström Black Hole Corrected by Bounce Parameter
• Generalized models for black-bounce solutions in $f(R)$ Gravity
• Gravitational-wave echoes from numerical-relativity waveforms via space-time construction near merging compact objects
• Ringing and echoes from black bounces surrounded by the string cloud
• Black bounces in Cotton gravity
• Birth of baby universes from gravitational collapse in a modified-gravity scenario
• Echoes of charged black-bounce spacetimes
• Source of black bounces in Rastall gravity
• Quantifying Systematic Biases in Black Hole Spectroscopy
• Orbits around a black bounce spacetime
• Field Sources for $f(R,R_{\mu \nu })$ Black-Bounce Solutions: The Case of K-Gravity
• Spectral lines of dirty wormholes
• Echoes from beyond: Detecting gravitational-wave quantum imprints with LISA
• Echoes from bounded universes
• Periodic equatorial orbits in a black bounce scenario
• On the Structure of Black Bounces Sourced by Anisotropic Fluids