Are extremal 2D black holes really frozen?

E.C. Vagenas
2001 Physics Letters B  
In the standard methodology for evaluating the Hawking radiation emanating from a black hole, the background geometry is fixed. Trying to be more realistic we consider a dynamical geometry for a two-dimensional charged black hole and we evaluate the Hawking radiation as tunneling process. This modification to the geometry gives rise to a nonthermal part in the radiation spectrum. We explore the consequences of this new term for the extremal case.
doi:10.1016/s0370-2693(01)00242-8 fatcat:thrnknlzhbg5xfh6ds3r3kr5l4