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Spin wave optics for gravitational waves lensed by a Kerr black hole

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arxiv 2408.03289 v3 pith:UIPVK3C4 submitted 2024-08-06 gr-qc

Kei-ichiro Kubota , Shun Arai , Hayato Motohashi , Shinji Mukohyama This is my paper · ORCID
classification gr-qc
keywords effectspingravitationalwavewavesblackholekerr
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Gravitational waves exhibit the unique signature of their spin-2 nature in processes of wave scattering, due to the interaction between spin and a background spacetime. Since the spin effect is more pronounced for longer wavelengths and gravitational waves sourced by binaries have a long wavelength, it may become an important effect in addition to the wave effect. We study the propagation of gravitational waves lensed by a Kerr black hole by numerically solving the Teukolsky equation with a source term of the equal-mass circular binary, taking into account both spin effect and wave effect. We find helicity-dependent small-period oscillation in the power spectrum of the amplification factor in the forward direction and the oscillation is enhanced as spin of a prograde Kerr black hole increases.

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Cited by 3 Pith papers

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

  1. Gravitational waves from b-EMRIs: Doppler shift and beaming, resonant excitation, helicity oscillations and self-lensing

    gr-qc 2025-06 conditional novelty 7.0 of 10

    A first-principles Teukolsky model of a binary extreme-mass-ratio inspiral shows Doppler modulation, beaming, self-lensing, helicity-dependent scattering, and SMBH ringdown resonances in the waveform.

  2. Spinoptics in the presence of axion-like particles in curved spacetime

    gr-qc 2026-07 accept novelty 6.5 of 10

    Spinoptics equations for axion–Maxwell theory yield helicity-dependent photon trajectory corrections from both spacetime curvature and arbitrary axion profiles.

  3. Ringdown and lensing of triple systems

    gr-qc 2026-05 unverdicted novelty 6.0 of 10

    Numerical relativity simulations of triple black hole systems reveal redshift effects and gravitational lensing in ringdown signals from head-on mergers, with no additional black hole formation from amplified waves.

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