Black supernovae and black holes in non-local gravity

@article{Bambi2016BlackSA,
  title={Black supernovae and black holes in non-local gravity},
  author={Cosimo Bambi and Daniele Malafarina and Leonardo Modesto},
  journal={Journal of High Energy Physics},
  year={2016},
  volume={2016},
  pages={1-21}
}
A bstractIn 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… 
View on Springer
link.springer.com
25 Citations
Background Citations
4

25 Citations

Lee–Wick black holes
Testing regular black holes with X-ray and GW data
. The presence of spacetime singularities in physically relevant solutions of the Einstein Equations is normally interpreted as a symptom of the breakdown of classical general relativity at very high…
Spacetime completeness of non-singular black holes in conformal gravity
We explicitly prove that the Weyl conformal symmetry solves the black hole singularity problem, otherwise unavoidable in a generally covariant local or non-local gravitational theory. Moreover, we…
Quantum radiation from a sandwich black hole
We discuss quantum radiation of a massless scalar field from a spherically symmetric nonsingular black hole with finite lifetime. Namely, we discuss a sandwich black-hole model, where a black hole is…
Exponential fading to white of black holes in quantum gravity
Quantization of the gravitational field may allow the existence of a decay channel of black holes into white holes with an explicit time-reversal symmetry. The definition of a meaningful decay…
Matter accretion onto a conformal gravity black hole
The accretion of test fluids flowing onto a black hole is investigated. Particularly, by adopting a dynamical Hamiltonian approach, we are capable to find the critical points for various cases of…
Regular Bardeen Black Holes in Anti-de Sitter Spacetime versus Kerr Black Holes through Particle Dynamics
In this work, test particle dynamics around a static regular Bardeen black hole (BH) in Anti-de Sitter spacetime has been studied. It has been shown for neutral test particles that parameters of a…
Beyond General Relativity: Modified Theories and Non-Singular Black Holes
Einstein’s general relativity is an extremely elegant and successful theory. Recent observations coming from the LIGO/VIRGO collaboration as well as from the Event Horizon Telescope give us the…
Black hole evaporation in conformal gravity
We study the formation and the evaporation of a spherically symmetric black hole in conformal gravity. From the collapse of a spherically symmetric thin shell of radiation, we find a singularity-free…
Stability of the Einstein static universe in f(R, T) gravity
The Einstein static (ES) universe has played a major role in various emergent scenarios recently proposed in order to cure the problem of the initial singularity of the standard model of cosmology.…
...
...

References

SHOWING 1-10 OF 108 REFERENCES
Can static regular black holes form from gravitational collapse?
Starting from the Oppenheimer–Snyder model, we know how in classical general relativity the gravitational collapse of matter forms a black hole with a central spacetime singularity. It is widely…
Terminating black holes in asymptotically free quantum gravity
We study the homogeneous gravitational collapse of a spherical cloud of matter in a super-renormalizable and asymptotically free theory of gravity. We find a picture that differs substantially from…
Non-singular quantum-inspired gravitational collapse
We consider general relativistic homogeneous gravitational collapses for dust and radiation. We show that replacing the density profile with an effective density justified by some quantum gravity…
Black holes in an ultraviolet complete quantum gravity
The lifetime problem of evaporating black holes: mutiny or resignation
It is logically possible that regularly evaporating black holes (REBHs) exist in nature. In fact, the prevalent theoretical view is that these are indeed the real objects behind the curtain in…
Exact solutions and spacetime singularities in nonlocal gravity
A bstractWe hereby study exact solutions in a wide range of local higher-derivative and weakly nonlocal gravitational theories. In particular, we give a list of exact classical solutions for two…
Information loss problem and a ‘black hole’ model with a closed apparent horizon
A bstractIn a classical description the spacetime curvature inside a black hole infinitely grows. In the domain where it reaches the Planckian value and exceeds it the Einstein equations should be…
Mass Gap for Black-Hole Formation in Higher-Derivative and Ghost-Free Gravity.
  • V. Frolov
  • Physics, Geology
    Physical review letters
  • 2015
TLDR
It is demonstrated that in a wide class of the higher dimensional theories of gravity as well as for the ghost-free gravity there exists a mass gap for mini-black-hole production.
Super-accelerating bouncing cosmology in asymptotically free non-local gravity
Recently, evidence has been collected that a class of gravitational theories with certain non-local operators is renormalizable. We consider one such model which, at the linear perturbative level,…
FORMATION AND EVAPORATION OF REGULAR BLACK HOLES
Black holes, predicted by Einstein gravity, appear to exist in the universe. Singularities were also predicted to form inside them by singularity theorems [Penrose 1965, Hawking 1967, Penrose &…
...
...