Black supernovae and black holes in non-local gravity

Abstract

In a previous paper, we studied the interior solution of a collapsing body in a non-local theory of gravity super-renormalizable at the quantum level. We found that the classical singularity is replaced by a bounce, after which the body starts expanding. A black hole, strictly speaking, never forms. The gravitational collapse does not create an event horizon but only an apparent one for a finite time. In this paper, we solve the equations of motion assuming that the exterior solution is static. With such an assumption, we are able to reconstruct the solution in the whole spacetime, namely in both the exterior and interior regions. Now the gravitational collapse creates an event horizon in a finite comoving time, but the central singularity is approached in an infinite time. We argue that these black holes should be unstable, providing a link between the scenarios with and without black holes. Indeed, we find a non catastrophic ghost-instability of the metric in the exterior region. Interestingly, under certain conditions, the lifetime of our black holes exactly scales as the Hawking evaporation time.

1+16 pages, 5 figures

References in corpus (13)

• Black holes in an ultraviolet complete quantum gravity
• Counting ghosts in the "ghost-free" non-local gravity
• The lifetime problem of evaporating black holes: mutiny or resignation
• Nonlocal quantum gravity and M-theory
• Fading Gravity and Self-Inflation
• Singularity-free gravitational collapse and asymptotic safety
• Singularity avoidance in quantum-inspired inhomogeneous dust collapse
• Can static regular black holes form from gravitational collapse?
• Radiation from an emitter in the ghost free scalar theory
• Singularity free gravitational collapse in an effective dynamical quantum spacetime
• Do Black Holes Exist?
• Cosmological Solutions in Nonlocal Models
• One-loop quantum gravity repulsion in the early Universe

Cited by in corpus (23)

• Notes on non-singular models of black holes
• Phenomenological aspects of black holes beyond general relativity
• Classical collapse to black holes and quantum bounces: A review
• Stability of the Einstein static Universe in $f(R,T)$ gravity
• Spacetime completeness of non-singular black holes in conformal gravity
• Test particle motion around black hole in Einstein-Maxwell-scalar theory
• Black hole evaporation in conformal gravity
• Exponential fading to white of black holes in quantum gravity
• Effective delta sources and regularity in higher-derivative and ghost-free gravity
• Charged particle motion around non-singular black holes in conformal gravity in the presence of external magnetic field
• Dynamics of charged particles and magnetic dipoles around magnetized quasi-Schwarzschild black holes
• Analysis of a regular black hole in Verlinde's gravity
• Testing regular black holes with X-ray and GW data
• Quantum radiation from a sandwich black hole
• Implications of a Simpson-Visser solution in Verlinde's framework
• Lee-Wick Black Holes
• Matter Accretion onto a Conformal Gravity Black Hole
• Quasi-harmonic oscillations of charged particles in static axially symmetric space-times immersed in a uniform magnetic field
• On effective models of regular black holes inspired by higher-derivative and nonlocal gravity
• Black holes in non-local gravity
• Testing Regular Black Holes with X-ray data of GX 339-4
• Entanglement swapping in black holes: restoring predictability
• Correction to Hawking radiation in non-singular gravitational collapse