Searching for black hole echoes from the LIGO-Virgo catalog GWTC-1

We have searched for possible gravitational wave echo signals for nine binary black hole merger events observed by Advanced LIGO and Virgo during the first and second observation runs. To construct an echo template, we consider Kerr spacetime, where the event horizon is replaced by a reflective memb...

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Bibliographic Details
Published in:Physical review. D 2019-09, Vol.100 (6), Article 062006
Main Authors: Uchikata, Nami, Nakano, Hiroyuki, Narikawa, Tatsuya, Sago, Norichika, Tagoshi, Hideyuki, Tanaka, Takahiro
Format: Article
Language:English
Subjects:
Black holes
Echoes
Event horizon
Gravitational waves
Membranes
Perturbation
Potential barriers
Reflection
Waveforms
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Summary:We have searched for possible gravitational wave echo signals for nine binary black hole merger events observed by Advanced LIGO and Virgo during the first and second observation runs. To construct an echo template, we consider Kerr spacetime, where the event horizon is replaced by a reflective membrane. We use a frequency-dependent reflection rate at the angular potential barrier, which is fitted to the numerical data obtained by solving Teukolsky equations. This reflection rate gives a frequency-dependent transmission rate that is suppressed at lower frequencies in the template. We also take into account the overall phase shift of the waveform as a parameter, which arises when the wave is reflected at the membrane and potential barrier. Using this template based on black hole perturbation, we find no significant echo signals in the binary black hole merger events.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.100.062006