Gravitational Anomalies, Hawking Radiation, and Spherically Symmetric Black Holes

Details Gravitational Anomalies, Hawking Radiation, and Spherically Symmetric Black Holes Gravitational Anomalies, Hawking Radiation, and Spherically Symmetric Black Holes

2006-06-08

arxiv.org/abs/hep-th/0606077v2

JHEP 0610 (2006) 025

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, no figure, LaTeX; (v2) rephrasing of Section 1, new results in Section 2, references updated and added. To appear in

Scientific paper

10.1088/1126-6708/2006/10/025

Motivated by the recent work of Robinson and Wilczek, we evaluate the gravitational anomaly of a chiral scalar field in a Vaidya spacetime of arbitrary mass function, and thus the outgoing flux from the time-dependent horizon in that spacetime. We show that this flux differs from that of a perfect blackbody at a fixed temperature. When this flux is taken into account, general covariance in that spacetime is restored. We also generalize their results to the most general static, and spherically symmetric spacetime.

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