Geodesic stability and quasi normal modes via Lyapunov exponent for Hayward black hole

Quasi - normal modes of the scalar hairy black hole

We calculate QNMs of the scalar hairy black hole in the AdS background using Horowitz-Hubeny method for the potential that is not known in analytical form. For some black hole parameters we found pure imaginary frequencies. Increasing of the scalar field mass does not cause the imaginary part to vanish, it reaches some minimum and then increases, thus in the case under consideration the infinit...

Dirac Quasi-Normal Modes in Schwarzschild Black Hole Spacetimes

H. T. Cho Department of Physics, Tamkang University, Tamsui, Taipei, Taiwan, Republic of China (Dated: February 8, 2006) Abstract We evaluate both the massless and the massive Dirac quasi-normal mode frequencies in the Schwarzschild black hole spacetime using the WKB approximation. For the massless case, we find that, similar to those for the integral spin fields, the real parts of the frequenc...

Second and higher-order quasi-normal modes in binary black hole mergers

Asymptotics of Quasi-normal Modes for Multi-horizon Black Holes

Abstract: The issue concerning rigorous methods recently developed in deriving the asymptotics of quasi-normal modes is revisited and applied to a generic non rotating multi-horizon black holes solution. Some examples are illustrated and the single horizon cases are also considered. As a result, the asymptotics for large angular momentum parameter is shown to depend on the difference between th...

Non-Rotating BTZ Black Hole Area Spectrum from Quasi-normal Modes

In this paper, by using the quasi-normal frequencies for non-rotating BTZ black hole derived by Cardos and Lemos, also via Bohr-Sommerfeld quantization for an adiabatic invariant, I = ∫ dE ω(E) , which E is the energy of system and ω(E) is vibrational frequency, we leads to an equally spaced mass spectrum. The result for the area of event horizon is An = 2π √ nmh̄ Λ which is not equally spaced, ...