The Hawking temperature of expanding cosmological black holes

Abstract

In the context of a debate on the correct expression of the Hawking temperature of an expanding cosmological black hole, we show that the correct expression in terms of the Hawking-Hayward quasi-local energy m of the hole is T=1/(8πm(t)). This expression holds for comoving black holes and agrees with a recent proposal by Saida, Harada, and Maeda.

5 latex pages, to appear in Phys. Rev. D. Some references added

References in corpus (4)

• The (pseudo)issue of the conformal frame revisited
• Cosmological expansion and local physics
• Einstein's equations as a thermodynamic identity: The cases of stationary axisymmetric horizons and evolving spherically symmetric horizons
• Black Hole Evaporation in an Expanding Universe

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• Cosmological LTB Black Hole in a Quintom Universe
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