Nonlinear effects in black hole ringdown
arXiv:2208.07374 · doi:10.1103/PhysRevLett.130.081401
Abstract
We report evidence for nonlinear modes in the ringdown stage of the gravitational waveform produced by the merger of two comparable-mass black holes. We consider both the coalescence of black hole binaries in quasicircular orbits and high-energy, head-on black hole collisions. The presence of nonlinear modes in the numerical simulations confirms that general-relativistic nonlinearities are important and must be considered in gravitational-wave data analysis.
6 + 6 pages, 7 figures. Matches version published in Physical Review Letters
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