Black hole ringdown echoes and howls

Hiroyuki Nakano, Norichika Sago, Hideyuki Tagoshi, Takahiro Tanaka

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)


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.

Original languageEnglish
Article numberptx093
JournalProgress of Theoretical and Experimental Physics
Issue number7
Publication statusPublished - Jul 2017

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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