Black Holes, Mergers, and the Entropy Budget of the Universe

Abstract

Vast amounts of entropy are produced in black hole formation, and the amount of entropy stored in supermassive black holes at the centers of galaxies is now much greater than the entropy free in the rest of the universe. Either mergers involved in forming supermassive black holes are rare,or the holes must be very efficient at capturing nearly all the entropy generated in the process. We argue that this information can be used to constrain supermassive black hole production, and may eventually provide a check on numerical results for mergers involving black holes.

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• Turnaround in Cyclic Cosmology
• What is the entropy of the universe?
• Anthropics and Myopics: Conditional Probabilities and the Cosmological Constant
• Upper and Lower Bounds on Gravitational Entropy
• Reconciling fractional entropy and black hole entropy compositions
• Black Holes, Entropy and the Third Law
• Unified meta-theory of information, consciousness, time and the classical-quantum universe