Quasi-Normal Modes of Gravitational Perturbation around a Reissner-Nordström Black Hole Surrounded by Quintessence

We investigate quasi-normal (QN) modes of gravitational perturbation around a Reissner-Nordström black hole surrounded by quintessence. The third-order Wentzel-Kramers-Brillouin approximation is used to evaluate QN frequencies. The behavior of the gravitational perturbation is plotted for some frequencies. Due to the presence of quintessence, QN modes of the Reissner-Nordström black hole damp at a slower rate.