On the role of closed timelike curves and confinement structure around Kerr-Newman singularity
arXiv:2406.02697 · doi:10.1142/S0218271824500342
Abstract
In this study, the particle motion around the naked singularity and black hole of Kerr-Newman spacetime is investigated with a special attention on the closed timelike orbits. It is found that both in the naked singularity (NS) and in black hole (BH), the singularity is concealed by causality violating regions, and the Cauchy surface consistently resides inside the inner horizon in non-extremal black holes. For neutral particles and particles with an identical charge to the source, only particles with positive angular momentum are permitted to traverse the closed timelike curves. Conversely, for particles with the opposite charge to the source, the strong Coulomb attraction draws all particles inside the Cauchy surface, allowing them to be present in the closed timelike curves irrespective of their angular momentum. However, in both the NS and BH (both extremal and non-extremal), test particles are confined at a considerable distance from the singular point such that there always exists an empty region surrounding the singularity which prevents particles from interacting with it. The radius of the empty surface that depends on the source parameters and the particle characteristics, is investigated with an accurate expression.
arXiv comment17 pages, 9 figures, accepted in IJMPD
References in corpus (44)
- Electron-positron pairs in physics and astrophysics: from heavy nuclei to black holes
- Time delay and magnification centroid due to gravitational lensing by black holes and naked singularities
- Recent developments in gravitational collapse and spacetime singularities
- Circular motion of neutral test particles in Reissner-Nordström spacetime
- A black hole mass threshold from non-singular quantum gravitational collapse
- A model for non-singular black hole collapse and evaporation
- Equatorial circular orbits of neutral test particles in the Kerr--Newman spacetime
- Rehabilitating space-times with NUTs
- Equatorial photon motion in the Kerr-Newman spacetimes with a non-zero cosmological constant
- Charged particle motion in Kerr-Newmann space-times
- Off-equatorial orbits in strong gravitational fields near compact objects
- Test of the weak cosmic censorship conjecture with a charged scalar field and dyonic Kerr-Newman black holes
- NUT wormholes
- Ultra-hard fluid and scalar field in the Kerr-Newman metric
- Naked singularities as particle accelerators
- Particle motion near high-spin black holes
- Acceleration of particles and shells by Reissner-Nordström naked singularities
- A non-singular black hole model as a possible end-product of gravitational collapse
- Completing characterization of photon orbits in Kerr and Kerr-Newman metrics
- Equatorial light bending around Kerr-Newman black holes
- Gravitational redshift/blueshift of light emitted by geodesic test particles, frame-dragging and pericentre-shift effects, in the Kerr-Newman-de Sitter and Kerr-Newman black hole geometries
- Detailed study of geodesics in the Kerr-Newman-(A)dS spactime and the rotating charged black hole spacetime in gravity
- Geodesic Motion of Neutral Particles around a Kerr-Newman Black Hole
- Space-time diagrammatics
- Null and time-like geodesics in Kerr-Newman black hole exterior
- Pair Production in Near Extremal Kerr-Newman Black Holes
- Rotating traversable wormholes in Einstein-Maxwell theory
- The initial value problem for linearized gravitational perturbations of the Schwarzschild naked singularity
- Geodesic Structure of Lifshitz Black Holes in 2+1 Dimensions
- Closed Timelike Curves, Singularities and Causality: A Survey from Gödel to Chronological Protection
- Reversible dynamics with closed time-like curves and freedom of choice
- Chronology Protection Implementation in Analogue Gravity
- Applications of the Tunneling Method to Particle Decay and Radiation from Naked Singularities
- Closed Timelike Curves Induced by a Buchdahl-inspired Vacuum Spacetime in Gravity
- Causality Aspects of Modified Kerr-Newman spacetimes
- The structure of the singular ring in Kerr-like metrics
- Closed timelike curves and chronology protection in quantum and classical simulators
- Photon emission of extremal Kerr-Newman black holes
- Electromagnetic waves around dilatonic stars and naked singularities
- Particle motion around traversable wormholes: Possibility of closed timelike geodesics
- Time-travelling billiard-ball clocks: a quantum model
- Quantum State Discrimination Circuits Inspired by Deutschian Closed Timelike Curves
- Quantum avoidance of Gödel's closed timelike curves
- The role of closed timelike curves in particle motion within Van Stockum space-time: A generalization