4 ms·

I understand what an event horizon is. What I don't understand is how you could remove one.

• joeyo 16y ago
  From the article: M^2 >= (J/M)^2 + Q^2 M is the mass of the black hole, J is its angular momentum, and Q is its charge. If the inequality is satisfied, that is it has sufficiently more mass than angular momentum and charge, then the black hole has an event horizon. However if the inequality is violated, either because of additional charge, or angular momentum, or both, then the black hole would have no event horizon and would exist as a naked singularity. This is generally regarded as a nonphysical solution-- large charged bodies tend not to exist in nature, and presumably any body that had sufficient angular momentum to push the black hole into violating the inequality would also have sufficient angular momentum to avoid falling into the back hole as well, but the authors of the paper have apparently devised some situation where the blackhole can be pushed into such a regime.