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Revisiting non-linearity in binary black hole mergers

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arxiv 2004.00671 v1 pith:2IUTIC6A submitted 2020-04-01 gr-qc astro-ph.HE

Maria Okounkova This is my paper
classification gr-qcastro-ph.HE
keywords binaryblackholeinfinitymergernon-linearityanswerbeen
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Recently, it has been shown that with the inclusion of overtones, the post-merger gravitational waveform at infinity of a binary black hole system is well-modelled using pure linear theory. However, given that a binary black hole merger is expected to be highly non-linear, where do these non-linearities, which do not make it out to infinity, go? We visualize quantities measuring non-linearity in the strong-field region of a numerical relativity binary black hole merger in order to begin to answer this question.

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  1. Quasinormal mode content of binary black hole ringdowns

    gr-qc 2025-10 conditional novelty 5.0 of 10

    A Bayesian, evidence-based analysis of 13 simulated black-hole ringdowns tabulates which quasinormal overtones, retrograde modes, and nonlinear (quadratic and cubic) modes are present at each start time, and finds no ...

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