Formalism
Definition
Spacetime configurations
Properties
Spacetimes
black hole spacetimes | vanishing angular momentum | positive angular momentum |
---|---|---|
vanishing charge | Schwarzschild spacetime | Kerr spacetime |
positive charge | Reissner-Nordstrom spacetime | Kerr-Newman spacetime |
Quantum theory
The Einstein equations for gravity in dimension 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 . 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 was found, in D=5 gravity, in
The first black ring solution was found, in D=5 supergravity, in:
Review:
Dimensional reduction to black holes in D=4 gravity:
On non-uniqueness:
Roberto Emparan, Rotating Circular Strings, and Infinite Non-Uniqueness of Black Rings, JHEP0403:064, 2004 (arXiv:hep-th/0402149)
Iosif Bena, Simon Ross, Nicholas Warner, Coiffured Black Rings, Class.Quant.Grav. 31 (2014) 165015 (arXiv:1405.5217)
As intersecting black M5-branes wrapped on a 4-manifold times the black ring’s circle:
following
More in the context of D1-D5-brane bound states
Iosif Bena, Per Kraus, Microscopic description of black rings in AdS/CFT JHEP 12 (2004) 070 (hep-th/0408186)
Iosif Bena, Per Kraus, Microstates of the D1-D5-KK system Phys. Rev. D72 (2005) 025007 (hep-th/0503053)
Alejandra Castro, Joshua L. Davis, Per Kraus, Finn Larsen, String Theory Effects on Five-Dimensional Black Hole Physics (arXiv:0801.1863)
Last revised on February 8, 2023 at 11:27:39. See the history of this page for a list of all contributions to it.