Comment on `Hawking radiation from fluctuating black holes'

Details Comment on `Hawking radiation from fluctuating black holes' Comment on `Hawking radiation from fluctuating black holes'

2010-08-30

arxiv.org/abs/1008.5059v1

Class.Quant.Grav.28:038001,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages, 1 fig; feynmp, amsrefs

Scientific paper

10.1088/0264-9381/28/3/038001

Takahashi & Soda (2010 Class. Quantum Grav. v27 p175008, arXiv:1005.0286) have recently considered the effect (at lowest non-trivial order) of dynamical, quantized gravitational fluctuations on the spectrum of scalar Hawking radiation from a collapsing Schwarzschild black hole. However, due to an unfortunate choice of gauge, the dominant (even divergent) contribution to the coefficient of the spectrum correction that they identify is a pure gauge artifact. I summarize the logic of their calculation, comment on the divergences encountered in its course and comment on how they could be eliminated, and thus the calculation be completed.

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