Imaging the destruction of a rotating regular black hole
arXiv:2503.07011 · doi:10.1088/1361-6382/ae1ac3
Abstract
A regular black hole, unconstrained by the weak cosmic censorship conjecture, can exceed its critical spin limit and transition into a superspinar. In this paper, we investigate the observational appearance of a rotating regular black hole, specifically the Ghosh black hole and its superspinar counterpart, when surrounded by a thin accretion disk. The resulting images reveal distinct features: the black hole closely resembles its Kerr counterpart with slight deviations, while the superspinar configuration exhibits an inner photon ring structure. Furthermore, we investigate the image transition of the Ghosh black hole that has recently been destroyed by a collapsing null shell carrying a specific angular momentum. The results indicate that, apart from a possible sudden burst of light, the inner photon ring undergoes gradual transitions over time, with the transition times depending on the additional angular momentum gained by the black hole. Our findings also suggest that the transition timescale becomes significant for supermassive black holes, with masses at least less than about twice that of M87*.
40 pages, 22 figures
References in corpus (40)
- First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
- First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
- Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A
- Regular black holes with a nonlinear electrodynamics source
- Generating rotating regular black hole solutions without complexification
- The Shape of the Black Hole Photon Ring: A Precise Test of Strong-Field General Relativity
- Test bodies and naked singularities: is the self-force the cosmic censor?
- Gedanken Experiments to Destroy a Black Hole II: Kerr-Newman Black Holes Cannot be Over-Charged or Over-Spun
- Observing the Inner Shadow of a Black Hole: A Direct View of the Event Horizon
- Field sources for Simpson-Visser space-times
- Image of Kerr-Melvin black hole with thin accretion disk
- Destroying a near-extremal Kerr-Newman black hole
- Asymptotic safety casts its shadow
- Imaging compact boson stars with hot-spots and thin accretion disks
- Images and photon ring signatures of thick disks around black holes
- Photon ring structure of rotating regular black holes and no-horizon spacetimes
- Regularized Stable Kerr Black Hole: Cosmic Censorships, Shadow and Quasi-Normal Modes
- Ergosphere and shadow of a rotating regular black hole
- Observational properties of relativistic fluid spheres with thin accretion disks
- Towards a Non-singular Paradigm of Black Hole Physics
- Images from disk and spherical accretions of hairy Schwarzschild black holes
- Photon rings as tests for alternative spherically symmetric geometries with thin accretion disks
- Black Hole Images as Tests of General Relativity: Effects of Plasma Physics
- Optical appearance of black holes surrounded by a dark matter halo
- Observational imprints of gravastars from accretion disks and hot-spots
- Are nonsingular black holes with super-Planckian hair ruled out by S2 star data?
- Black Holes in Asymptotically Safe Gravity
- Destroying the event horizon of a nonsingular rotating quantum-corrected black hole
- Quantum radiation from a sandwich black hole
- Optical appearance of a thin-shell wormhole with a Hayward profile
- Quantum gravity lights up spinning black holes
- Regular Rotating Black Holes: A Review
- Shadow Geometry of Kerr Naked Singularities
- Imaging a semi-classical horizonless compact object with strong redshift
- Gravitational lensing and accretion disk imaging of a Buchdahl dense core
- Anisotropic gravastar as horizonless regular black hole spacetime and its images illuminated by thin accretion disk
- Kodama-like Vector Fields in Axisymmetric Spacetimes
- How strings can explain regular black holes
- Observational and theoretical aspects of Superspinars
- Circular geodesic orbits in the equatorial plane of a charged rotating disc of dust