Anisotropic gravastar as horizonless regular black hole spacetime and its images illuminated by thin accretion disk
arXiv:2411.12358 · doi:10.1140/epjc/s10052-024-13519-6
Abstract
A connection between regular black holes and horizonless ultracompact objects was proposed in~\cite{Carballo-Rubio:2022nuj}. In this paper, we construct a model of a horizonless compact object, specifically an anisotropic gravastar with continuous pressure, that corresponds to regular black hole spacetime in the appropriate limit. The construction begins by modeling an equation of state that satisfies the anisotropic gravastar conditions and transitions to the de Sitter () upon horizon formation. The spacetime structure is similar to the {\it Quantum Horizonless Compact Object} (QHCO) described in~\cite{Chen:2024ibc}. Within this model, we also generate images of the corresponding objects surrounded by a thin accretion disk. The resulting images reveal that assuming that the emitting matter exists only outside the object, the inner light ring structure closely resembles that of the horizonless configuration of a regular black hole and the QHCO, yet it exhibits a distinct light ring structure compared to the thin-shell gravastar model. However, the opposite occurs when emitting matter is taken into account inside the object.
References in corpus (38)
- Formation and evaporation of non-singular black holes
- Regular Black Hole in General Relativity Coupled to Nonlinear Electrodynamics
- Testing the nature of dark compact objects: a status report
- The Bardeen Model as a Nonlinear Magnetic Monopole
- Regular Magnetic Black Holes and Monopoles from Nonlinear Electrodynamics
- Black Hole Shadows, Photon Rings, and Lensing Rings
- Shadows and strong gravitational lensing: a brief review
- Light ring stability in ultra-compact objects
- Gravastars must have anisotropic pressures
- Light rings as observational evidence for event horizons: long-lived modes, ergoregions and nonlinear instabilities of ultracompact objects
- Gravitational Condensate Stars: An Alternative to Black Holes
- Overcharging a Black Hole and Cosmic Censorship
- Over-spinning a black hole with a test body
- The Shape of the Black Hole Photon Ring: A Precise Test of Strong-Field General Relativity
- Regular black holes: A short topic review
- New Type of Regular Black Holes and Particlelike Solutions from Nonlinear Electrodynamics
- Gravastar Solutions with Continuous Pressures and Equation of State
- Measurement of the spin of the M87 black hole from its observed twisted light
- Field sources for Simpson-Visser space-times
- Electrically charged gravastar configurations
- Imaging compact boson stars with hot-spots and thin accretion disks
- Exotic Compact Objects and the Fate of the Light-Ring Instability
- Destroying Kerr-Sen black holes
- Black Hole Images as Tests of General Relativity: Effects of Spacetime Geometry
- Investigating shadow images and rings of the charged Horndeski black hole illuminated by various thin accretions
- Observational properties of relativistic fluid spheres with thin accretion disks
- Regular Black Holes: Towards a New Paradigm of Gravitational Collapse
- Images from disk and spherical accretions of hairy Schwarzschild black holes
- Black Hole Images as Tests of General Relativity: Effects of Plasma Physics
- Shadow and deflection angle of asymptotic, magnetically-charged, non-singular black hole
- Generalised Hayward spacetimes: Geometry, matter and scalar quasinormal modes
- Observational imprints of gravastars from accretion disks and hot-spots
- Towards VLBI Observations of Black Hole Structure
- Are nonsingular black holes with super-Planckian hair ruled out by S2 star data?
- Horizonless spacetimes as seen by present and next-generation Event Horizon Telescope arrays
- Nested solutions of gravitational condensate stars
- Overspinning a rotating black hole in semiclassical gravity with type-A trace anomaly
- Gravastar in the framework of Loop Quantum Cosmology
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