Thermodynamic properties of massive dilaton black holes II

Details Thermodynamic properties of massive dilaton black holes II Thermodynamic properties of massive dilaton black holes II

2002-05-13

arxiv.org/abs/gr-qc/0205048v3

Phys.Rev.D66:104021,2002

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

8 pages, 7 figures, corrected some mistakes

Scientific paper

10.1103/PhysRevD.66.104021

We numerically reanalyze static and spherically symmetric black hole solutions in an Einstein-Maxwell-dilaton system with a dilaton potential $m_{d}^{2}\phi^{2}$. We investigate thermodynamic properties for various dilaton coupling constants and find that thermodynamic properties change at a critical dilaton mass $m_{d,crit}$. For $m_{d}\geq m_{d,crit}$, the black hole becomes an extreme solution for a nonzero horizon radius $r_{h,ex}$ as the Reissner-Nordstr\"om black hole. However, if $m_{d}$ is nearly equal to $m_{d,crit}$, there appears a solution of smaller horizon radius than $r_{h,ex}$. For $m_{d}

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