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Tidal deformation of dynamical horizons in binary black hole mergers

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arxiv 2106.02595 v3 pith:IV6X5FTL submitted 2021-06-04 gr-qc

Vaishak Prasad , Anshu Gupta , Sukanta Bose , Badri Krishnan This is my paper · ORCID
classification gr-qc
keywords blackdeformationlovetidalbinarymergersmomentsmultipole
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An important physical phenomenon that manifests itself during the inspiral of two orbiting compact objects is the tidal deformation of each under the gravitational influence of its companion. In the case of binary neutron star mergers, this tidal deformation and the associated Love numbers have been used to probe properties of dense matter and the nuclear equation of state. Non-spinning black holes on the other hand have a vanishing (field) tidal Love number in General Relativity. This pertains to the deformation of the asymptotic gravitational field. In certain cases, especially in the late stages of the inspiral phase when the black holes get close to each other, the source multipole moments might be more relevant in probing their properties and the No-Hair conjecture; contrastingly, these Love numbers do not vanish. In this paper, we track the source multipole moments in simulations of several binary black hole mergers and calculate these Love numbers. We present evidence that, at least for modest mass ratios, the behavior of the source multipole moments is universal.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Thermodynamics of Black Holes, far from Equilibrium

    gr-qc 2025-12 conditional novelty 6.0 of 10

    The paper derives finite, physical-process versions of the first and second laws of black hole thermodynamics for dynamical horizon segments, extending the first law to black holes arbitrarily far from equilibrium.

  2. Time-frequency structure in the post-merger binary black hole gravitational wave signal

    gr-qc 2025-05 conditional novelty 6.0 of 10

    Post-merger signals from asymmetric black hole binaries develop extra time-frequency peaks for strong aligned spin and a broken sky symmetry for mild precessing spin, consistent with the horizon-geometry correlation idea.

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