Physics
Scientific paper
Jan 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978acppb...9....3c&link_type=abstract
Acta Physica Polonica, Vol. B9, 3-10
Physics
1
Black Holes, Horizons, Thermodynamics
Scientific paper
We investigate a natural extension of the fundamental formula for black hole dynamics found by Christodoulou and Ruffini (1971) for Kerr-Newman black holes by generalizing it to any value of the mass. New transformations, having irreversible character, are introduced and studied in detail. There are shown to be intimately related to the horizons of the black hole, since during any evolution governed by the improved equations either the area of the event horizon or the area of the antievent horizon are kept constant. We propose a new more symmetrical form of the fundamental formula and we introduce two new parameters characterizing the black holes which are naturally associated with the set of new transformations. The possible physical implications are also discussed.
Curir Anna
Francaviglia Mauro
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