black ring

The Einstein equations for gravity in dimension $\geq 5$ admit black hole solutions whose event horizon is not homeomorphic to an n-sphere, but has different topology. In particular in 5d-gravity and 5d supergravity there are solutions with topology $S^1 \times S^2$. These are called *black rings*.

Their KK-reduction down to 4 dimensions yields again ordinary black holes. This plays a central role in the discussion of black holes in string theory.

The first black ring solution in 5d gravity was found in

- Roberto Emparan, Harvey Reall,
*A rotating black ring in five dimensions*, Phys.Rev.Lett.88:101101,2002 (arXiv:hep-th/0110260)

The first solution in 5d supergravity was given in

- Henriette Elvang, Roberto Emparan, David Mateos, Harvey Reall,
*Supersymmetric 4D Rotating Black Holes from 5D Black Rings*, JHEP0508:042,2005 (arXiv:hep-th/0504125)

Created on August 26, 2016 at 12:43:10. See the history of this page for a list of all contributions to it.