Black hole mass and angular momentum in 2+1 gravity

Details Black hole mass and angular momentum in 2+1 gravity Black hole mass and angular momentum in 2+1 gravity

2003-01-31

arxiv.org/abs/gr-qc/0301129v3

Phys.Rev. D68 (2003) 024032

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

23 pages, 3 references added, to be published in Physical Review D

Scientific paper

10.1103/PhysRevD.68.024032

We propose a new definition for the mass and angular momentum of neutral or electrically charged black holes in 2+1 gravity with two Killing vectors. These finite conserved quantities, associated with the SL(2,R) invariance of the reduced mechanical system, are shown to be identical to the quasilocal conserved quantities for an improved gravitational action corresponding to mixed boundary conditions. They obey a general Smarr-like formula and, in all cases investigated, are consistent with the first law of black hole thermodynamics. Our framework is applied to the computation of the mass and angular momentum of black hole solutions to several field-theoretical models.

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