Observational Signature and Additional Photon Rings of Asymmetric Thin-shell Wormhole

Peng, Jun; Guo, Minyong; Feng, Xing-Hui

doi:10.48550/arxiv.2102.05488

Cited by 18 publications

(19 citation statements)

References 26 publications

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“…Finally, the presence of wormhole structures yields interesting new possibilities, such as shadows from objects without accretion disks due to contribution of those disks on the other side of the wormhole and flowing through the wormhole throat, or the generalization of our analysis to reflection-asymmetric wormholes since they produce effective potentials with two maxima (i.e. two unstable circular orbits), which can be capable to yield additional light rings [56,57].…”

Section: Conclusion and Prospectsmentioning

confidence: 99%

Shadows and optical appearance of black bounces illuminated by a thin accretion disk

Guerrero,

Olmo,

Rubiera-Garcia

et al. 2021

Preprint

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We study the light rings and shadows of an uniparametric family of spherically symmetric geometries interpolating between the Schwarzschild solution, a regular black hole, and a traversable wormhole, and dubbed as black bounces, all of them sharing the same critical impact parameter. We consider the ray-tracing method in order to study the impact parameter regions corresponding to the direct, lensed, and photon ring emission, finding a broadening of all these regions for black bounce solutions as compared to the Schwarzschild one. Using this, we determine the optical appearance of black bounces when illuminated by three standard toy models of optically and geometrically thin accretion disks viewed in face-on orientation.

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Section: Conclusion and Prospectsmentioning

confidence: 99%

Shadows and optical appearance of black bounces illuminated by a thin accretion disk

Guerrero,

Olmo,

Rubiera-Garcia

et al. 2021

Preprint

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“…Let us assume now the effective potential to have different shapes on M ± . These reflection-asymmetric WHs have been considered recently in the literature [31][32][33]. Suppose again the observer to be located on M + and the asymmetric potential to have its absolute maximum on M − .…”

Section: Reflection-asymmetric Critical Curvesmentioning

confidence: 99%

New light rings from multiple critical curves as observational signatures of black hole mimickers

Olmo,

Rubiera-Garcia,

Gómez

2021

Preprint

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We argue that the appearance of additional light rings in a shadow observation -beyond the infinite sequence of exponentially demagnified self-similar rings foreseen in the Kerr solution -would make a compelling case for the existence of black hole mimickers having multiple critical curves. We support this claim by discussing three different scenarios of spherically symmetric wormhole geometries having two such critical curves, and explicitly work out the optical appearance of one such object when surrounded by an optically and geometrically thin accretion disk.

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“…[28][29][30][31][32][33][34] and generalized and alternative surfaces of the photon spheres are also suggested [35]. Recently, compact objects with two photon spheres were suggested [18,[36][37][38][39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Retrolensing by two photon spheres of a black-bounce spacetime

Tsukamoto

2022

Preprint

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We investigated by retrolensing by two photon spheres of a black-bounce spacetime suggested by Lobo et al. which can correspond to a Schwarzschild spacetime, a regular black hole, and a traversable wormhole including an Ellis-Bronnikov wormhole. In a case, the wormhole has a throat which acts as a photon sphere and it has another photon sphere outside of the throat. If the sun as a light source, an observer, and the wormhole are line up in this order, rays emitted by the sun are reflected by slightly outside of the throat and outside and inside of the outer photon sphere and they can reach to the observer. We show that the light rays reflected by the outer photon sphere are dominant in retrolensing light curves in the case.

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Observational Signature and Additional Photon Rings of Asymmetric Thin-shell Wormhole

Cited by 18 publications

References 26 publications

Shadows and optical appearance of black bounces illuminated by a thin accretion disk

Shadows and optical appearance of black bounces illuminated by a thin accretion disk

New light rings from multiple critical curves as observational signatures of black hole mimickers

Retrolensing by two photon spheres of a black-bounce spacetime

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