Mechanics of apparent horizons

Details Mechanics of apparent horizons Mechanics of apparent horizons

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phrvd..45..495c&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 45, Issue 2, 15 January 1992, pp.495-498

Physics

16

Black Holes

Scientific paper

An equation for the variation in the surface area of an apparent horizon is derived which has the same form as the thermodynamic relation TdS=dQ. For a stationary vacuum black hole, the expression corresponding to a temperature equals the temperature of the event horizon. Also, if the black hole is perturbed infinitesimally by weak matter and gravitational fields, the area variation of the apparent horizon asymptotically approaches the Hartle-Hawking result for the event horizon. These results support the idea that a local version of black-hole thermodynamics in nonstationary systems can be constructed for apparent horizons.

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