Abstract
We show how in gravitational collapse the Hawking radiation at large times is precisely related to a scaling limit on the sphere where the star radius crosses the Schwarzschild radius (as long as the back reaction of the radiation on the metric is neglected). For a free quantum field it can be exactly evaluated and the result agrees with Hawking's prediction. For a realistic quantum field theory no evaluation based on general principles seems possible. The outcoming radiation depends on the field theoretical model.
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Communicated by A. Jaffe
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Fredenhagen, K., Haag, R. On the derivation of Hawking radiation associated with the formation of a black hole. Commun.Math. Phys. 127, 273–284 (1990). https://doi.org/10.1007/BF02096757
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DOI: https://doi.org/10.1007/BF02096757