Recently the possibility of detecting echoes of ringdown gravitational waves from binary black hole mergers was shown. The presence of echoes is expected if the black hole is surrounded by a mirror that reflects gravitational waves near the horizon. Here, we present slightly more sophisticated templates motivated by a waveform which is obtained by solving the linear perturbation equation around a Kerr black hole with a complete reflecting boundary condition in the stationary traveling wave approximation. We estimate that the proposed template can bring about a 10% improvement in the signal-to-noise ratio.
Progress of Theoretical and Experimental Physics
- Pub Date:
- July 2017
- General Relativity and Quantum Cosmology;
- Astrophysics - High Energy Astrophysical Phenomena
- 10 pages, 5 figures, matches the published version