# Overspinning a black hole with a test body.

@article{Jacobson2009OverspinningAB, title={Overspinning a black hole with a test body.}, author={Ted Jacobson and Thomas P. Sotiriou}, journal={Physical review letters}, year={2009}, volume={103 14}, pages={ 141101 } }

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.

## 158 Citations

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

- PhysicsThe European Physical Journal C
- 2020

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

- PhysicsPhysical Review D
- 2020

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

- Physics
- 2010

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

- Physics
- 2010

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

- Physics, MathematicsThe European Physical Journal C
- 2020

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

- Physics
- 2015

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

- Physics
- 2015

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

- PhysicsThe European Physical Journal C
- 2022

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

- PhysicsThe European Physical Journal C
- 2022

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…

## References

SHOWING 1-10 OF 13 REFERENCES

### Gravitational radiation from colliding black holes

- Physics
- 1971

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

- MathematicsProceedings 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

- Physics
- 1965

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

- Education
- 1998

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.

- PhysicsPhysical 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.

- PhysicsPhysical review. D, Particles and fields
- 1996

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.