BLACK HOLES IN THREE-DIMENSIONAL DILATON GRAVITY THEORIES
Paulo M. Sa', Antares Kleber, Jose' P. S. Lemos
TL;DR
This paper analyzes three-dimensional black holes within a generalized dilaton gravity framework, exploring their causal structures, geodesic motions, and mass properties across various special cases including string theory and general relativity.
Contribution
It provides a comprehensive analysis of black hole solutions in a generalized dilaton gravity theory with multiple parameters, covering seven different cases and their physical properties.
Findings
Different causal structures identified for each case.
Explicit ADM mass calculations for various solutions.
Geodesic behaviors characterized for null and timelike particles.
Abstract
Three dimensional black holes in a generalized dilaton gravity action theory are analysed. The theory is specified by two fields, the dilaton and the graviton, and two parameters, the cosmological constant and the Brans-Dicke parameter. It contains seven different cases, of which one distinguishes as special cases, string theory, general relativity and a theory equivalent to four dimensional general relativity with one Killing vector. We study the causal structure and geodesic motion of null and timelike particles in the black hole geometries and find the ADM masses of the different solutions.
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