Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1998-05-02
Phys.Rev. D59 (1999) 124007
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
15 pages, 9 figures, Revtex. Published version. Changes: figures added to text
Scientific paper
10.1103/PhysRevD.59.124007
The thermodynamical properties of the Reissner-Nordstr\"om-anti-de Sitter black hole in the grand canonical ensemble are investigated using York's formalism. The black hole is enclosed in a cavity with finite radius where the temperature and electrostatic potential are fixed. The boundary conditions allow us to compute the relevant thermodynamical quantities, e.g. thermal energy, entropy and charge. The stability conditions imply that there are thermodynamically stable black hole solutions, under certain conditions. Instantons with negative heat capacity are also found.
Lemos José P. S.
Peça Claudia
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