Issue
EPL
Volume 85, Number 1, January 2009
Article Number 10004
Number of page(s) 5
Section General
DOI http://dx.doi.org/10.1209/0295-5075/85/10004
Published online 16 January 2009
EPL, 85 (2009) 10004
DOI: 10.1209/0295-5075/85/10004

Anomalies, horizons and Hawking radiation

Sunandan Gangopadhyay

National Institute for Theoretical Physics (NIThep), Stellenbosch Institute for Advanced Study (STIAS) 7600 Stellenbosch, South Africa

sunandan.gangopadhyay@gmail.com

received 11 November 2008; accepted in final form 6 December 2008; published January 2009
published online 16 January 2009

Abstract
Hawking radiation is obtained from the Reissner-Nordström black hole with a global monopole and the Garfinkle-Horowitz-Strominger black hole falling in the class of the most general spherically symmetric black holes $(\sqrt{-g}\neq1) $, using only the chiral anomaly near the event horizon and the covariant boundary condition at the event horizon. The approach differs from the anomaly cancellation approach since apart from the covariant boundary condition, the chiral anomaly near the horizon is the only input to derive the Hawking flux.

PACS
04.70.Dy - Quantum aspects of black holes, evaporation, thermodynamics.
03.65.Sq - Semiclassical theories and applications.
04.62.+v - Quantum fields theory in curved spacetime.

© EPLA 2009