Ringing of the regular black-hole/wormhole transition

Churilova, M. S.; Stuchlík, Zdeněk

doi:10.1088/1361-6382/ab7717

Cited by 90 publications

(61 citation statements)

References 84 publications

(145 reference statements)

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“…Further research analysing SV spacetime has been performed in a plethora of other papers; please see reference 35 for details. These analyses include discussion of the quasi-normal modes and associated ringdown 36,37 , calculations pertaining to shadows and gravitational lensing effects [38][39][40][41][42][43] , as well as discourse surrounding precession phenomena 44 .…”

Section: Simpson-vissermentioning

confidence: 99%

Black-bounce to traversable wormhole

Simpson

Visser

2019

J. Cosmol. Astropart. Phys.

247

286

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So-called "regular black holes" are a topic currently of considerable interest in the general relativity and astrophysics communities. Herein we investigate a particularly interesting regular black hole spacetime described by the line elementThis spacetime neatly interpolates between the standard Schwarzschild black hole and the Morris-Thorne traversable wormhole; at intermediate stages passing through a black-bounce (into a future incarnation of the universe), an extremal null-bounce (into a future incarnation of the universe), and a traversable wormhole. As long as the parameter a is non-zero the geometry is everywhere regular, so one has a somewhat unusual form of "regular black hole", where the "origin" r = 0 can be either spacelike, null, or timelike. Thus this spacetime generalizes and broadens the class of "regular black holes" beyond those usually considered.

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Section: Simpson-vissermentioning

confidence: 99%

Black-bounce to traversable wormhole

Simpson

Visser

2019

J. Cosmol. Astropart. Phys.

247

286

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“…A time-dependent version [27] of such a spacetime was extended from its original static one and a spherically symmetric thin-shell traversable wormhole was established by it [28]. Its quasinormal modes [29], absorpa e-mail: yixie@nju.edu.cn (corresponding author) tion of scalar waves [30] and gravitational lensing [31] were also investigated.…”

Section: Introductionmentioning

confidence: 99%

Precessing and periodic motions around a black-bounce/traversable wormhole

Zhou

Xie

2020

Eur. Phys. J. C

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We investigate precessing and periodic geodesic motions of timelike particles around a black-bounce/traversable wormhole. After obtaining its semi-classic and relativistic periastron advance, we find a preliminary bound on the scale length of such a spactime based on the detected precession of the star S2 around the Galactic Center. We also study periodic orbits around it and find that the variation of the scale length can change the taxonomy of the periodic orbits and cause the transition from a periodic orbit to a quasi-periodic one and vice versa.

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“…The existence of the outer horizon (or at the very least an extremal horizon) is critical to setting up the correct radiative boundary conditions. Other techniques for approximating the QNMs, e.g., time domain integration (see reference [26] for an example), are likely to be applicable in this context. For now, this research is relegated to the domain of the future.…”

Section: First-order Wkb Approximation Of the Quasi-normal Modesmentioning

confidence: 99%

Ringing of the Regular Black Hole with Asymptotically Minkowski Core

Simpson

2021

Universe

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A Regge–Wheeler analysis is performed for a novel black hole mimicker ‘the regular black hole with asymptotically Minkowski core’, followed by an approximation of the permitted quasi-normal modes for propagating waveforms. A first-order WKB approximation is computed for spin zero and spin one perturbations of the candidate spacetime. Subsequently, numerical results analysing the respective fundamental modes are compiled for various values of the a parameter (which quantifies the distortion from Schwarzschild spacetime), and for various multipole numbers ℓ. Both electromagnetic spin one fluctuations and scalar spin zero fluctuations on the background spacetime are found to possess shorter-lived, higher-energy signals than their Schwarzschild counterparts for a specific range of interesting values of the a parameter. Comparison between these results and some analogous results for both the Bardeen and Hayward regular black holes is considered. Analysis as to what happens when one permits perturbations of the Regge–Wheeler potential itself is then conducted, first in full generality, before specialising to Schwarzschild spacetime. A general result is presented explicating the shift in quasi-normal modes under perturbation of the Regge–Wheeler potential.

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Ringing of the regular black-hole/wormhole transition

Cited by 90 publications

References 84 publications

Black-bounce to traversable wormhole

Black-bounce to traversable wormhole

Precessing and periodic motions around a black-bounce/traversable wormhole

Ringing of the Regular Black Hole with Asymptotically Minkowski Core

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