The Black Holes of a General Two-Dimensional Dilaton Gravity Theory

Abstract

A general dilaton gravity theory in 1+1 spacetime dimensions with a cosmological constant $\lambda$ and a new dimensionless parameter $\omega$, contains as special cases the constant curvature theory of Teitelboim and Jackiw, the theory equivalent to vacuum planar General Relativity, the first order string theory, and a two-dimensional purely geometrical theory. The equations of this general two-dimensional theory admit several different black holes with various types of singularities. The singularities can be spacelike, timelike or null, and there are even cases without singularities. Evaluation of the ADM mass, as a charge density integral, is possible in some situations, by carefully subtrating the black hole solution from the corresponding linear dilaton at infinity.

27 pages (25 figures), LaTex, Lisbon preprint DF/IST-9.93 and Univ. of Algarve preprint UATP-93/05

References in corpus (4)

• Evanescent Black Holes
• Non-Singularity of the Exact Two-Dimensional String Black Hole
• Nonsingular Lagrangians for Two Dimensional Black Holes
• Non-Singular Constant Curvature Two-Dimensional Black Hole

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