Observational appearance of Kaluza-Klein black holes

Abstract

The optical properties of rotating black holes in Kaluza-Klein theory described by the total mass, spin, and electric and magnetic charges are investigated in detail. Using a developed general relativistic ray-tracing code to calculate the motion of photons, the numerous shadows of Kaluza-Klein black holes are generated. The properties of the black hole shadow and the light deflection angle around these black holes are also studied in order to put constraints on the parameters of Kaluza-Klein black holes using M87* shadow observations. The possibility of imposing constraints on Kaluza-Klein black holes using shadow observations is investigated. Moreover, we find that small charges (electric and magnetic) of the black hole can meet these constraints. We conclude that with the current precision of the M87* black hole shadow image observation by the EHT collaboration, the shadow observations of Kaluza-Klein black holes are indistinguishable from that of the Kerr black hole. Much better observational accuracy than the current capabilities of the EHT collaboration are required in order to place verified constraints on the parameters of modified theories of gravity in the strong field regime.

13 pages, 9 figures. v2: refereed version

References in corpus (24)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
• Calculating black hole shadows: Review of analytical studies
• Time delay and magnification centroid due to gravitational lensing by black holes and naked singularities
• A Metric for Rapidly Spinning Black Holes Suitable for Strong-Field Tests of the No-Hair Theorem
• Tests for the existence of horizons through gravitational wave echoes
• A new method for shadow calculations: application to parameterised axisymmetric black holes
• Apparent shape of super-spinning black holes
• Null geodesics and shadow of a rotating black hole in extended Chern-Simons modified gravity
• Shadow of a Kaluza-Klein rotating dilaton black hole
• Testing the black hole "no-hair" hypothesis
• The effect of the Brane-Dicke coupling parameter on weak gravitational lensing by wormholes and naked singularities
• Gravitational Lensing in presence of Plasma: Strong Lens Systems, Black Hole Lensing and Shadow
• Shape and position of the shadow in the $\delta =2$ Tomimatsu-Sato space-time
• Black hole mimicker hiding in the shadow: Optical properties of the $\gamma$-metric
• Profiles of emission lines generated by rings orbiting braneworld Kerr black holes
• Shadows and photon rings of regular black holes and geonic horizonless compact objects
• Images and photon ring signatures of thick disks around black holes
• A Rotating Kaluza-Klein Black Hole with Squashed Horizons
• Shadows of CPR black holes and tests of the Kerr metric
• Testing General Relativity with NuSTAR data of Galactic Black Holes
• Photon sphere and shadow of a time-dependent black hole described by a Vaidya metric
• Lightlike Geodesics and Gravitational Lensing in the Spacetime of an Accelerating Black Hole
• X-ray reflection spectroscopy with Kaluza-Klein black holes

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• Observational properties of black hole in quantum fluctuation modified gravity
• Exploring black hole shadows in axisymmetric spacetimes with coordinate-independent methods and neural networks