Toward numerical-relativity informed effective-one-body waveforms for dynamical capture black hole binaries

Dynamical captures of black holes may take place in dense stellar media due to the emission of gravitational radiation during a close passage. Detection of such events requires detailed modeling, since their phenomenology qualitatively differs from that of quasicircular binaries. Very few models can deliver such waveforms, and none includes information from numerical relativity (NR) simulations of nonquasicircular coalescences. In this study we present a first step towards a fully NR-informed effective-one-body (EOB) model of dynamical captures. We perform 14 new simulations of single and double encounter mergers, and use this data to inform the merger-ringdown model of the TEOBResumS-Dalì approximant. We keep the initial energy approximately fixed to the binary mass, and vary the mass-rescaled, dimensionless angular momentum in the range (0.6, 1.1), the mass ratio in (1, 2.15), and aligned dimensionless spins in (-0.5,0.5). We find that the model is able to match NR to 97%, improving previous performances, without the need of modifying the baseline template. Upon NR informing the model, this improves to 99% with the exception of one outlier corresponding to a direct plunge. The maximum EOB/NR phase difference at merger for the uninformed model is of 0.15 radians, which is reduced to 0.1 radians after the NR information is introduced. We outline the steps towards a fully informed EOB model of dynamical captures, and discuss future improvements.

© American Physical Society (APS) [Toward numerical-relativity informed effective-one-body waveforms for dynamical capture black hole binaries. Physical Review D 109, 8 (2024)]

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Work Title Toward numerical-relativity informed effective-one-body waveforms for dynamical capture black hole binaries
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Open Access
Creators
  1. Tomas Andrade
  2. Juan Trenado
  3. Simone Albanesi
  4. Rossella Gamba
  5. Sebastiano Bernuzzi
  6. Alessandro Nagar
  7. Juan Calderon Bustillo
  8. Nicolas Sanchis-Gual
  9. José A. Font
  10. William Cook
  11. Boris Daszuta
  12. Francesco Zappa
  13. David Radice
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Physical Review D
Publication Date April 12, 2024
Publisher Identifier (DOI)
  1. https://doi.org/10.1103/PhysRevD.109.084025
Deposited July 15, 2024

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Version 1
published

  • Created
  • Added 2307.08697v1.pdf
  • Added Creator Tomas Andrade
  • Added Creator Juan Trenado
  • Added Creator Simone Albanesi
  • Added Creator Rossella Gamba
  • Added Creator Sebastiano Bernuzzi
  • Added Creator Alessandro Nagar
  • Added Creator Juan Calderon Bustillo
  • Added Creator Nicolas Sanchis-Gual
  • Added Creator José A. Font
  • Added Creator William Cook
  • Added Creator Boris Daszuta
  • Added Creator Francesco Zappa
  • Added Creator David Radice
  • Published
  • Updated
  • Updated Publication Date Show Changes
    Publication Date
    • 2024-04-15
    • 2024-04-12