2,791 research outputs found
Dilaton Black Holes in de Sitter or Anti-de Sitter Universe
Poletti and Wiltshire have shown that, with the exception of a pure
cosmological constant, the solution of a dilaton black hole in the background
of de Sitter or anti-de Sitter universe, does not exist in the presence of one
Liouville-type dilaton potential. Here with the combination of three
Liouville-type dilaton potentials, we obtain the dilaton black hole solutions
in the background of de Sitter or anti-de Sitter universe.Comment: 13 pages,to appear in Phys. Rev.
Higher Dimensional Dilaton Black Holes with Cosmological Constant
The metric of a higher-dimensional dilaton black hole in the presence of a
cosmological constant is constructed. It is found that the cosmological
constant is coupled to the dilaton in a non-trivial way. The dilaton potential
with respect to the cosmological constant consists of three Liouville-type
potentials.Comment: 8 pages,to appear in Phys. Lett.
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