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Article Dans Une Revue Phys.Rev.D Année : 2024

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

Tomas Andrade
  • Fonction : Auteur
Juan Trenado
  • Fonction : Auteur
Simone Albanesi
  • Fonction : Auteur
Rossella Gamba
  • Fonction : Auteur
Sebastiano Bernuzzi
  • Fonction : Auteur
Juan Calderon Bustillo
  • Fonction : Auteur
Nicolas Sanchis-Gual
  • Fonction : Auteur
José A Font
  • Fonction : Auteur
William Cook
  • Fonction : Auteur
Boris Daszuta
  • Fonction : Auteur
Francesco Zappa
  • Fonction : Auteur
David Radice
  • Fonction : Auteur

Résumé

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 modelling, since their phenomenology qualitatively differs from that of quasi-circular binaries. Very few models can deliver such waveforms, and none includes information from Numerical Relativity (NR) simulations of non quasi-circular 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-Dali 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 base-line template. Upon NR informing the model, this improves to $99%$ with the exception of one outlier corresponding to a direct plunge. The maximum EOBNR 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.

Dates et versions

hal-04174911 , version 1 (01-08-2023)

Identifiants

Citer

Tomas Andrade, Juan Trenado, Simone Albanesi, Rossella Gamba, Sebastiano Bernuzzi, et al.. Towards numerical-relativity informed effective-one-body waveforms for dynamical capture black hole binaries. Phys.Rev.D, 2024, 109 (8), pp.084025. ⟨10.1103/PhysRevD.109.084025⟩. ⟨hal-04174911⟩
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