Astrophysics and Space Science

, Volume 225, Issue 2, pp 221–226 | Cite as

Bounds for mass and rotation of black holes in the observable universe

  • A. De Vries
  • R. Böhme
  • Th. Schmidt-Kaler
Article

Abstract

The bounds for the energy change rate of a Maxwell field in the outer space of a rotating black hole, calculated by de Vries (1994) and de Vries (1995), enable us to deduce limits for the rotation and the mass of black holes. For this purpose we assume that a certain part of the anisotropies of the cosmic background radiation is due to absorption or superradiance of black holes (Teukolsky, 1973, Starobinskii and Churilov, 1973). The knowledge of these anisotropies yields bounds for rotation and mass of the black holes in the observable universe.

Key words

Black holes General relativity Cosmology Mathematical physics 

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Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • A. De Vries
    • 1
  • R. Böhme
    • 1
  • Th. Schmidt-Kaler
    • 2
  1. 1.Institut für MathematikRuhr-UniversitätBochum
  2. 2.Astronomisches InstitutRuhr-UniversitätBochum

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