# Condition for Superradiance in Higher-dimensional Rotating Black Holes

Authors
Type
Published Article
Publication Date
Apr 16, 2005
Submission Date
Mar 22, 2005
Identifiers
DOI: 10.1016/j.physletb.2005.04.022
Source
arXiv
It is shown that the superradiance modes always exist in the radiation by the $(4+n)$-dimensional rotating black holes. Using a Bekenstein argument the condition for the superradiance modes is shown to be $0 < \omega < m \Omega$ for the scalar, electromagnetic and gravitational waves when the spacetime background has a single angular momentum parameter about an axis on the brane, where $\Omega$ is a rotational frequency of the black hole and $m$ is an azimuthal quantum number of the radiated wave.