Taking the Temperature of a Black Hole

Details Taking the Temperature of a Black Hole Taking the Temperature of a Black Hole

2008-05-13

arxiv.org/abs/0805.1876v3

JHEP 0809:066,2008

Physics

High Energy Physics

High Energy Physics - Theory

latex, 14 pages, 4 figures, v3: added references, matches published version

Scientific paper

10.1088/1126-6708/2008/09/066

We use the global embedding of a black hole spacetime into a higher dimensional flat spacetime to define a local temperature for observers in free fall outside a static black hole. The local free-fall temperature remains finite at the event horizon and in asymptotically flat spacetime it approaches the Hawking temperature at spatial infinity. Freely falling observers outside an AdS black hole do not see any high-temperature thermal radiation even if the Hawking temperature of such black holes can be arbitrarily high.

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