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Non-Kerr Constraints using Binary Black Hole inspirals considering phase modifications up to 4 PN order

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arxiv 2406.03846 v1 pith:PKQP4FOR submitted 2024-06-06 gr-qc astro-ph.HE

Debtroy Das , Swarnim Shashank , Cosimo Bambi This is my paper · ORCID
classification gr-qcastro-ph.HE
keywords kerrblackholespacetimearoundbinaryconsideringconstraints
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abstract

The gravitational field around an astrophysical black hole (BH) is thought to be described by the Kerr spacetime, which is a solution of the Einstein equation. Signatures of binary black hole (BBH) coalescence in gravitational waves (GW) follow the Kerr spacetime as the theoretical foundation. Hence, any possible deviations from the Kerr spacetime around BHs serve as a test of the nature of gravity in the strong-field regime and of the predictions of General Relativity. In our study, we perform a theory-agnostic test of the Kerr hypothesis using BBH inspirals from the third Gravitational-wave Transient Catalog (GWTC-3). Considering the Johannsen metric, we compute the leading-order deviation to the emitted GW in the frequency domain. Our results provide constraints on two deformation parameters ($\alpha_{13}$ and $\epsilon_3$) and demonstrate the degeneracy between these two non-Kerr parameters.

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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. Quasi-normal modes of slowly-rotating Johannsen black holes

    gr-qc 2024-12 conditional novelty 6.0 of 10

    For slowly rotating Johannsen black holes, the deformation parameter alpha_13 dominates the quasi-normal mode shifts, and ringdown data from GW170104 bound it to be consistent with zero.

  2. Observing the eye of the storm I: testing regular black holes with LVK and EHT observations

    gr-qc 2024-11 conditional novelty 5.0 of 10

    EHT shadow sizes and LIGO/Virgo/KAGRA inspiral waveforms allow only small values of the dimensionless regularity parameter ℓ in the Ghosh-Simpson-Visser regular black hole.

  3. Stellar-Mass Black Holes

    astro-ph.HE 2025-07 conditional novelty 1.0 of 10

    A concise review of stellar-mass black hole physics and observations, plus a speculative interstellar mission concept.

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