Abstract
We numerically reanalyze static and spherically symmetric black hole solutions in an Einstein-Maxwell-dilaton system with a dilaton potential. We consider two types of potentials: and where which is proposed based on gluino condensation. We investigate thermodynamic properties in both cases and find that the black hole becomes an extreme solution for a finite horizon radius when a dilaton potential does not vanish. As a result, the Hawking temperature approaches zero in the extreme limit whereas it approaches a finite nonzero value in this limit for the massless dilaton case. This implies that a small amount of the dilaton mass changes the final fate of the black hole.
- Received 11 April 2001
DOI:https://doi.org/10.1103/PhysRevD.64.084002
©2001 American Physical Society