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We study the correlation between a part of the gravitational field at thecommon dynamical horizon in the strong field regime and the news of thegravitational radiation received from the system in the weak field regime, inthe post-merger phase of quasi-circular, non-spinning binary black hole mergersusing numerical relativity simulations. We find that, as in the inspiral phasePhys.Rev.Lett.125,121101, the shear of the common dynamical horizon formed lateinto the inspiral continues to be well correlated with the news of the outgoinggravitational radiation even at early times. We show by fitting that the shearcontains certain quasi-normal frequencies and information about the masses andspins of the remnant and the parent black holes, providing evidence to supportthe horizon correlation conjecture holds for dynamical horizons in binary blackhole mergers.

The Shear at the Common Dynamical Horizon in Binary Black Hole Mergers and its Imprint in their Gravitational Radiation