Gravitational wave sources: reflections and echoes
arXiv:1702.04833 · doi:10.1088/1361-6382/aa8f29
Abstract
The recent detection of gravitational waves has generated interest in alternatives to the black hole interpretation of sources. One set of such alternatives involves a prediction of gravitational wave "echoes". We consider two aspects of possible echoes: First, general features of echoes coming from spacetime reflecting conditions. We find that the detailed nature of such echoes does not bear any clear relationship to quasi-normal frequencies. Second, we point out the pitfalls in the analysis of local reflecting "walls" near the horizon of rapidly rotating black holes.
8 pages, 4 figures; to appear in Classical & Quantum Gravity (CQG)
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