Overcharging a Black Hole and Cosmic Censorship

Details Overcharging a Black Hole and Cosmic Censorship Overcharging a Black Hole and Cosmic Censorship

1998-08-17

arxiv.org/abs/gr-qc/9808043v1

Phys.Rev. D59 (1999) 064013

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

26 pages, 3 figures, LaTeX

Scientific paper

10.1103/PhysRevD.59.064013

We show that, contrary to a widespread belief, one can overcharge a near extremal Reissner-Nordstrom black hole by throwing in a charged particle, as long as the backreaction effects may be considered negligible. Furthermore, we find that we can make the particle's classical radius, mass, and charge, as well as the relative size of the backreaction terms arbitrarily small, by adjusting the parameters corresponding to the particle appropriately. This suggests that the question of cosmic censorship is still not wholly resolved even in this simple scenario. We contrast this with attempting to overcharge a black hole with a charged imploding shell, where we find that cosmic censorship is upheld. We also briefly comment on a number of possible extensions.

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