Mass formulae for a class of nonrotating black holes

Abstract

In the presence of a Killing symmetry, various self-gravitating field theories with massless scalars (moduli) and vector fields reduce to sigma-models, effectively coupled to 3-dimensional gravity. We argue that this particular structure of the Einstein-matter equations gives rise to quadratic relations between the asymptotic flux integrals and the area and surface gravity (Hawking temperature) of the horizon. The method is first illustrated for the Einstein-Maxwell system. A derivation of the quadratic formula is then also presented for the Einstein-Maxwell-axion-dilaton model, which is relevant to the bosonic sector of heterotic string theory.

18 pages, revtex, no figures

References in corpus (1)

• Ehlers-Harrison transformations and black holes in Dilaton-Axion Gravity with multiple vector fields

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