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  Low significance of evidence for black hole echoes in gravitational wave data

Westerweck, J., Nielsen, A., Birnholtz, O., Cabero, M., Capano, C., Dent, T., et al. (2018). Low significance of evidence for black hole echoes in gravitational wave data. Physical Review D, 97(12): 124037. doi:10.1103/PhysRevD.97.124037.

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 Creators:
Westerweck, Julian1, Author           
Nielsen, Alex2, Author           
Birnholtz, Ofek1, Author           
Cabero, Miriam1, Author           
Capano, Collin1, Author           
Dent, Thomas1, Author           
Krishnan, Badri2, Author           
Meadors, Grant David, Author
Nitz, Alexander H.1, Author           
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              
2Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc, Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM
 Abstract: Recent detections of merging black holes allow observational tests of the
nature of these objects. In some proposed models, non-trivial structure at or
near the black hole horizon could lead to echo signals in gravitational wave
data. Recently, Abedi, Dykaar and Afshordi claimed tentative evidence for
repeating damped echo signals following the gravitational-wave signals of the
binary black hole merger events recorded in the first observational period of
the Advanced LIGO interferometers. We reanalyse the same data, addressing some
of the shortcomings of their method using more background data and a modified
procedure. We find a reduced statistical significance for the claims of
evidence for echoes, and calculate increased p-values for the null hypothesis
of signal-free noise. We conclude that their analysis does not provide
significant observational evidence for the existence of Planck-scale structure
at black hole horizons.

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 Dates: 2017-12-282018
 Publication Status: Published in print
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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : American Physical Society
Pages: - Volume / Issue: 97 (12) Sequence Number: 124037 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: https://pure.mpg.de/cone/journals/resource/111088197762258