Overspinning a black hole with a test body.

  title={Overspinning a black hole with a test body.},
  author={Ted Jacobson and Thomas P. Sotiriou},
  journal={Physical review letters},
  volume={103 14},
It has long been known that a maximally spinning black hole cannot be overspun by tossing in a test body. Here we show that if instead the black hole starts out with below maximal spin, then indeed overspinning can be achieved. We find that requirements on the size and internal structure of the test body can be met if the body carries in orbital but not spin angular momentum. Our analysis neglects radiative and self-force effects, which may prevent the overspinning. 

Weak cosmic censorship conjecture for the novel 4D charged Einstein–Gauss–Bonnet black hole with test scalar field and particle

Recent researches of the novel 4D Einstein–Gauss–Bonnet (EGB) gravity have attracted great attention. In this paper, we investigate the validity of the weak cosmic censorship conjecture for a novel

Weak cosmic censorship conjecture for a Kerr-Taub-NUT black hole with a test scalar field and particle

Motivated by the recent research of black holes with NUT charge, we investigate the validity of the weak cosmic censorship conjecture for the Kerr-Taub-NUT black hole with a test massive scalar field

Destroying black holes with test bodies

If a black hole can accrete a body whose spin or charge would send the black hole parameters over the extremal limit, then a naked singularity would presumably form, in violation of the cosmic

Might black holes reveal their inner secrets

Black holes harbor a spacetime singularity of infinite curvature, where classical spacetime physics breaks down, and current theory cannot predict what will happen. However, the singularity is

Quasi-normal modes of near-extremal black holes in generalized spherically symmetric spacetime and strong cosmic censorship conjecture

A number of near-extremal conditions are utilized to simplify the equation of motion of the neutral scalar perturbations in generalized spherically symmetric black hole background into a differential

Self-force in Non-vacuum Spacetimes: Theory and Applications

SELF-FORCE IN NON-VACUUM SPACETIMES: THEORY AND APPLICATIONS Peter Zimmerman Advisor: University of Guelph, 2015 Professor Eric Poisson In the past, the formulation of the gravitational self-force

Gravitational self-force in nonvacuum spacetimes: An effective field theory derivation

In this paper we investigate the motion of small compact objects in non-vacuum spacetimes using methods from effective field theory in curved spacetime. Although a vacuum formulation is sufficient in

New Gedanken experiment on RN-AdS black holes surrounded by quintessence

In this paper, we use the new version of Gedanken experiment to investigate the weak cosmic censorship conjecture(WCCC) for RN-AdS black holes surrounded by quintessence. The process of matter fields

Testing the weak cosmic censorship conjecture for extremal magnetized Kerr–Newman black holes

We test the weak cosmic censorship conjecture for magnetized Kerr–Newman spacetime via the method of injecting a test particle. Hence, we need to know how the black hole’s parameters change when a



Gravitational radiation from colliding black holes

It is shown that there is an upper bound to the energy of the gravitational radiation emitted when one collapsed object captures another. In the case of two objects with equal masses $m$ and zero

The singularities of gravitational collapse and cosmology

  • S. HawkingR. Penrose
  • Mathematics
    Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences
  • 1970
A new theorem on space-time singularities is presented which largely incorporates and generalizes the previously known results. The theorem implies that space-time singularities are to be expected if

Gravitational collapse and spacetime singularities

accompanied by a violent release of energy, possible in the form of gravitational radiation. The detailed mathematical discussion of such situations is difficult since the full complexity of general

The question of cosmic censorship

Cosmic censorship is discussed in its various facets. It is concluded that rather little clear-cut progress has been made to date, and that the question is still very much open.

Third law of black-hole dynamics: A formulation and proof.

  • Israel
  • Physics
    Physical review letters
  • 1986
It is shown that no continuous process in which the energy tensor of accreted matter remains bounded and satisfies the weak energy condition in a neighborhood of the apparent horizon can reduce the

Gravitational waves induced by a spinning particle falling into a rotating black hole.

The results obtained in this paper will be an important guideline to quantitative estimates of gravitational waves in numerical relativistic simulations of the head-on collision of two spinning black holes.