Gravitational Anomalies, Hawking Radiation, and Spherically Symmetric Black Holes

Abstract

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.

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

References in corpus (3)

• Anomalies, Hawking Radiations and Regularity in Rotating Black Holes
• Hawking Radiation from Charged Black Holes via Gauge and Gravitational Anomalies
• Hawking Radiation from Rotating Black Holes and Gravitational Anomalies

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