26,368 research outputs found
Area spectrum of the d-dimensional Reissner-Nordstrom black hole in the small charge limit
A conjecture by Hod states that for the black hole horizon the spacing of its
area spectrum is determined by the asymptotic value of its quasinormal
frequencies. Recently to overcome some difficulties, Maggiore proposes some
changes to the original Hod's conjecture. Taking into account the modifications
proposed by Maggiore we calculate the area spectrum of the d-dimensional
Reissner-Nordstrom black hole in the small charge limit.Comment: 11 page
Quasinormal modes of D-dimensional de Sitter spacetime
We calculate the exact values of the quasinormal frequencies for an
electromagnetic field and a gravitational perturbation moving in
-dimensional de Sitter spacetime (). We also study the quasinormal
modes of a real massive scalar field and we compare our results with those of
other references.Comment: 26 pages, 1 table. Some changes made according to referee's
suggestions. Matches published version in GR
Area spectrum of the D-dimensional de Sitter spacetime
The determination of the quantum area spectrum of a black hole horizon by
means of its asymptotic quasinormal frequencies has been explored recently. We
believe that for D-dimensional de Sitter horizon we must study if the idea
works. Thus taking into account the local description of the thermodynamics of
horizons proposed by Padmanabhan and the results of Hod, Kunstatter, and
Maggiore we study the area spectrum of the D-dimensional de Sitter horizon.Comment: 6 pages, accepted for publication in Physics Letters
Electromagnetic quasinormal modes of D-dimensional black holes II
By using the sixth order WKB approximation we calculate for an
electromagnetic field propagating in D-dimensional Schwarzschild and
Schwarzschild de Sitter black holes its quasinormal frequencies for the
fundamental mode and first overtones. We study the dependence of these QN
frequencies on the value of the cosmological constant and the spacetime
dimension. We also compare with the known results for the gravitational
perturbations propagating in the same background. Moreover we exactly compute
the QN frequencies of the electromagnetic field propagating in D-dimensional
massless topological black hole and for charged D-dimensional Nariai spacetime
we exactly calculate the QN frequencies of the coupled electromagnetic and
gravitational perturbations.Comment: 34 pages, 14 figures, 6 table
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