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 et al.
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.
Low significance of evidence for black hole echoes in gravitational wave data · Around
Built on
D. A. MacDonald, R. H. Price, K. S. Thorne(editors) “Black Holes: The Membrane Paradigm” Yale University Press (1986)
1986
Earlier work this paper cites.
G. M. Harry [LIGO Scientific Collaboration], “Advanced LIGO: The next generation of gravitational wave detectors,” Class. Quant. Grav. 27
LIGO Scientific Collaboration, “LIGO Open Science Center - Data Releases for Observed Transients”, 2017, doi:10.7935/K5MW2F23, 10.7935/K5CC0XMZ, 10.7935/K5H41PBP, 10.7935/K53X84K2 http://losc.ligo.org/events