Echoes of novel black-bounce spacetimes

Abstract

Gravitational wave echoes can be used as a significant observable to understand the properties of black holes horizon. In addition, echoes would also closely relate to the unique properties of compact objects. In this work we study the evolution of electromagnetic field and scalar field under the background of novel black-bounce spacetimes. Our results show an obvious echoes signal that can characterize the properties of novel black-bounce spacetimes, and a detailed analysis about the characteristics of the echoes signal is given. By studying the quasinormal ringdown of the three states of novel black-bounce spacetimes, including black holes in $0<a<2M$, the one-way wormhole in $a=2M$ and the traversable wormhole in $a>2M$, we find that the echoes signal only appears when $a>2M$ in this spacetime, but when the parameter $a$ increases to a threshold, the echoes signal will be transformed into a quasinormal ringdown of the two-way traversable wormhole.

References in corpus (16)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• First M87 Event Horizon Telescope Results. II. Array and Instrumentation
• First M87 Event Horizon Telescope Results. III. Data Processing and Calibration
• Can environmental effects spoil precision gravitational-wave astrophysics?
• Echoes of ECOs: gravitational-wave signatures of exotic compact objects and of quantum corrections at the horizon scale
• Higher order WKB formula for quasinormal modes and grey-body factors: recipes for quick and accurate calculations
• Tests for the existence of horizons through gravitational wave echoes
• Wormholes as Black Hole Foils
• Mining information from binary black hole mergers: a comparison of estimation methods for complex exponentials in noise
• How does a dark compact object ringdown?
• Arbitrarily long-lived quasinormal modes in a wormhole background
• Gravitational wave echoes from black holes in massive gravity
• Nonlinear Electromagnetic Quasinormal Modes and Hawking Radiation of A Regular Black Hole with Magnetic Charge
• Echoes of Compact Objects in Scalar-Tensor Theories of Gravity
• Decay of Dirac Massive Hair in the Background of Spherical Black Hole
• Object Picture of Quasinormal Modes for Stringy Black Holes

Cited by in corpus (1)

• Bardeen-Kiselev black hole with cosmological constant