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Résumé |
Non-extremal black holes, which emit thermal Hawking
radiation, have two horizons: the event horizon or outer horizon and
the Cauchy horizon or inner horizon. Surprisingly, for a broad class
of solutions to the Einstein equations, the product of the areas of
the inner and outer horizons is the square of the area of the horizon
of the zero temperature black hole obtained from taking the smooth
extremal limit. We use the attractor mechanism in supergravity to
motivate this result and offer a CFT interpretation. |
