Hawking radiation and masses in generalized dilaton theories

Abstract
A generalized dilaton action is considered of which the standard dilaton black hole and spherically reduced gravity are particular cases. The Arnowitt - Deser - Misner (ADM) and the Bondi - Sachs (BS) mass are calculated. Special attention is paid to both the asymptotic conditions for the metric as well as for the reference spacetime. For the latter one we suggest a modified expression thereby obtaining a new definition of energy. Depending on the parameters of the model the Hawking radiation behaves like a positive or negative power of the mass.
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