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

Abstract

We present a new class of spinning black hole solutions in $(2+1)$-dimensional general relativity minimally coupled to a dilaton with potential $e^{b\varphi }\Lambda$. 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.

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

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• Charged Dilaton Black Holes with Unusual Asymptotics
• Quasilocal Thermodynamics of Dilaton Gravity coupled to Gauge Fields
• The electrically charged BTZ black hole with self(anti-self) dual Maxwell field
• Multi-black hole solutions in cosmological Einstein-Maxwell-dilaton theory

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