Spinning Black Holes in (2+1)-dimensional String and Dilaton Gravity

Details Spinning Black Holes in (2+1)-dimensional String and Dilaton Gravity Spinning Black Holes in (2+1)-dimensional String and Dilaton Gravity

1995-10-31

arxiv.org/abs/gr-qc/9510069v2

Phys.Lett. B371 (1996) 199-205

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

8 pages, Latex, statements about mass of 2+1 Hirschmann and Welch magnetic solution corrected, in press in Phys. Lett. B

Scientific paper

10.1016/0370-2693(95)01609-0

We present a new class of spinning black hole solutions in $(2+1)$-dimensional general relativity minimally coupled to a dilaton with potential $e^{b\phi}\Lambda$. When $b=4$, the corresponding spinning black hole is a solution of low energy $(2+1)$-dimensional string gravity. Apart from the limiting case of the $BTZ$ black hole, these spinning black holes have no inner horizon and a curvature singularity only at the origin. We compute the mass and angular momentum parameters of the solutions at spatial infinity, as well as their temperature and entropy.

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