On the Topology and area of higher dimensional black holes

Feb, 2001
15 pages
Published in:
  • Class.Quant.Grav. 18 (2001) 2707-2718
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Abstract:
Over the past decade there has been an increasing interest in the study of black holes, and related objects, in higher (and lower) dimensions, motivated to a large extent by developments in string theory. The aim of the present paper is to obtain higher dimensional analogues of some well known results for black holes in 3+1 dimensions. More precisely, we obtain extensions to higher dimensions of Hawking's black hole topology theorem for asymptotically flat (Λ=0\Lambda=0) black hole spacetimes, and Gibbons' and Woolgar's genus dependent, lower entropy bound for topological black holes in asymptotically locally anti-de Sitter (Λ<0\Lambda<0) spacetimes. In higher dimensions the genus is replaced by the so-called σ\sigma-constant, or Yamabe invariant, which is a fundamental topological invariant of smooth compact manifolds.
  • space-time
  • higher-dimensional
  • black hole
  • differential geometry
  • topology
  • string model