Electronic Resource
Springer
General relativity and gravitation
20 (1988), S. 829-839
ISSN:
1572-9532
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The sign of the Gaussian curvature of the ergosurface of a Kerr-Newman black hole depends on the amounts of the angular momentum and electric charge of the black hole. It is proved that polar cups of negative curvature exist on the ergosurface. In spite of the existence of these regions of negative curvature, a global embedding of the ergosurface on a Euclidean 3-space is always possible contrary to the case of the horizon where the negative curvature cups do not allow such an embedding. The dependence of the ergosurface's shape (prolate or oblate) on the values of the angular momentum and charge of the black hole is also discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00758903
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