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Building a bridge between comparable and extreme mass ratio black hole binaries: a single spin precessing model for the final state

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arxiv 2401.13342 v2 pith:OMISEGAS submitted 2024-01-24 gr-qc

Maria de Lluc Planas , Joan Llobera-Querol , Sascha Husa This is my paper
classification gr-qc
keywords masscomparablebinariesextremeratiospinfitsratios
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Modelling the gravitational wave signal from binaries beyond comparable mass is an important open issue in gravitational wave astronomy. For non-spinning binaries and when the spins are aligned with the orbital angular momentum, some first studies concerning the transition between the comparable and extreme mass ratio regime are already available, which suggest that extreme mass ratio results at times extrapolate to comparable mass ratios with surprising precision. Here we study the case of misaligned spins: We present new NR simulations performed with the Einstein Toolkit code at mass ratios up to 18 and construct a heterogeneous dataset that spans all mass ratios, including data from NR simulations, numerical approximations to extreme mass ratio binaries, and data from the geodesic approximation. As a first application we provide fits for the remnant mass and spin magnitude in single spin precessing systems, omitting consideration of the in-plane spin orientation. These fits demonstrate accuracy comparable to the state-of-the-art NRSur7dq4EmriRemnant model, all while retaining the simplicity and efficiency inherent in previous phenomenological fits.

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Cited by 4 Pith papers

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

  1. Probing Direct Waves in Black Hole Ringdowns

    gr-qc 2025-09 conditional novelty 7.0 of 10

    Merger gravitational wave signals contain a 'direct wave' from the plunging companions, screened by the remnant's potential, with frequency near the superradiant value for high-spin remnants and SNR above 10 in GW1509...

  2. Unified remnant models for aligned-spin, precessing, and eccentric binary black hole mergers

    gr-qc 2026-08 conditional novelty 6.0 of 10

    New analytic fits, gwModelRemS/P, predict remnant mass, spin, luminosity, and kick for black hole mergers from equal mass to q=1000, with a neural-flow model for precessing kicks.

  3. Secular evolution of orbital parameters for general bound orbits in Kerr spacetime

    gr-qc 2026-03 conditional novelty 6.0 of 10

    Analytic formulas for the orbit-averaged gravitational-wave fluxes of energy, angular momentum, and Carter constant for generic bound Kerr orbits are extended to 6PN order and O(e^16) in eccentricity, with numerical T...

  4. PhenomXPNR: An improved gravitational wave model linking precessing inspirals and NR-calibrated merger-ringdown

    gr-qc 2025-07 conditional novelty 4.0 of 10

    PhenomXPNR is a fast frequency-domain gravitational-wave template for spinning black-hole mergers that combines post-Newtonian inspiral precession with numerical-relativity-calibrated merger and ringdown.

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