http://arxiv.org/abs/1704.07175
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 a little 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. We also point out that the completely reflecting boundary leads to a super-radiant instability, and hence it is not consistent with the presence of rotating black holes.
H. Nakano, N. Sago, H. Tagoshi, et. al.
Tue, 25 Apr 17
5/59
Comments: 9 pages, 5 figures