Hawking Radiation of Linear Dilaton Black Holes in Various Theories

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Using the Damour-Ruffini-Sannan, the Parikh-Wilczek and the thin film brick-wall models, we investigate the Hawking radiation of uncharged massive particles from 4-dimensional linear dilaton black holes, which are the solutions to Einstein-Maxwell-Dilaton, Einstein-Yang-Mills-Dilaton and Einstein-Yang-Mills-Born-Infeld-Dilaton theories.

• Our results show that the tunneling rate is related to the change of Bekenstein-Hawking entropy.
• Contrary to the many studies in the literature, here the emission spectrum is precisely thermal.
• This implies that the derived emission spectrum is not consistent with the unitarity of the quantum theory, which would possibly lead to the information loss.