Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2003-03-12
Phys.Rev.D68:024018,2003
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
15 pages, LaTeX, 6 figures, the 6th order WKB formula for computing QNMs in Mathematica is available from the author upon requ
Scientific paper
10.1103/PhysRevD.68.024018
We study characteristic (quasinormal) modes of a $D$-dimensional Schwarzshild black hole. It proves out that the real parts of the complex quasinormal modes, representing the real oscillation frequencies, are proportional to the product of the number of dimensions and inverse horizon radius $\sim$ $D$ $r_{0}^{-1}$. The asymptotic formula for large multipole number $l$ and arbitrary $D$ is derived. In addition the WKB formula for computing QN modes, developed to the 3th order beyond the eikonal approximation, is extended to the 6th order here. This gives us an accurate and economic way to compute quasinormal frequencies.
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