Research Papers (JVN)
Permanent URI for this collectionhttp://localhost:4000/handle/11007/400
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Item Black hole physics in globally hyperbolic space-times(Indian Academy of Sciences, 1982-02-16) Joshi, P. S.; Narlikar, J. V.The usual definition of a black hole is modified to make it applicable in a globally hyperbolic space-time. It is shown that in a closed globally hyperbolic universe the surface area of a black hole must eventually decrease. The implications of this breakdown of the black hole area theorem are discussed in the context of thermodynamics and cosmology. A modified definition of surface gravity is also given for non-stationary universes. The limitations of these concepts are illustrated by the explicit example of the Kerr-Vaidya metric.