Motivated by the TeV-scale gravity scenarios, we study gravitational radiation in the head-on collision of two black holes in higher dimensional spacetimes using a close-limit approximation. We prepare time-symmetric initial data sets for two black holes (the so-called Brill-Lindquist initial data) and numerically evolve the spacetime in terms of a gauge invariant formulation for the perturbation around the higher-dimensional Schwarzschild black holes. The waveform and radiated energy of gravitational waves emitted in the head-on collision are clarified. Also, the complex frequencies of fundamental quasinormal modes of higher-dimensional Schwarzschild black holes, which have not been accurately derived so far, are determined.
@article{arxiv.gr-qc/0508063,
title = {Close-limit analysis for head-on collision of two black holes in higher dimensions: Brill-Lindquist initial data},
author = {Hirotaka Yoshino and Tetsuya Shiromizu and Masaru Shibata},
journal= {arXiv preprint arXiv:gr-qc/0508063},
year = {2009}
}