Fixed Scalars and Suppression of Hawking Evaporation

Abstract

For an extreme charged black hole some scalars take on a fixed value at the horizon determined by the charges alone. We call them fixed scalars. We find the absorption cross section for a low frequency wave of a fixed scalar to be proportional to the square of the frequency. This implies a strong suppression of the Hawking radiation near extremality. We compute the coefficient of proportionality for a specific model.

10 pages, latex

References in corpus (5)

• Microscopic Origin of the Bekenstein-Hawking Entropy
• D-brane Approach to Black Hole Quantum Mechanics
• Supersymmetry and Attractors
• Comparing decay rates for black holes and D-branes
• Moduli, Scalar Charges, and the First Law of Black Hole Thermodynamics

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