Building upon recent work, we present an improved effective-one-body (EOB) model for spin-aligned, coalescing, black hole binaries with generic orbital configurations, i.e., quasicircular, eccentric, or hyperbolic orbits. The model, called TEOBResumSGeneral, relies on the idea of incorporating general Newtonian prefactors, instead of the usual quasicircular ones, in both radiation reaction and waveform. The major advance with respect to previous work is that the quasicircular limit of the model is now correctly informed by numerical relativity (NR) quasicircular simulation. This provides EOB/NR unfaithfulness for the dominant quadrupolar waveform, calculated with Advanced LIGO noise, at most of the order of 1% over a meaningful portion of the quasicircular NR simulations computed by the Simulating eXtreme Spacetime (SXS) collaboration. In the presence of eccentricity, the model is similarly NR-faithful, ≤1%, all over the 28 public SXS NR datasets, with initial eccentricity up to ≃0.2, mass ratio up to q = 3 and dimensionless spin magnitudes as large as +0.7. Higher multipoles, up to l = 5 are also reliably modeled through the eccentric inspiral, plunge, merger and ringdown. For hyperbolic-like configurations, we also show that the EOB computed scattering angle is in excellent agreement with all currently available NR results.
Effective one-body multipolar waveform model for spin-aligned, quasicircular, eccentric, hyperbolic black hole binaries
Bonino A.;Rettegno P.
2021-01-01
Abstract
Building upon recent work, we present an improved effective-one-body (EOB) model for spin-aligned, coalescing, black hole binaries with generic orbital configurations, i.e., quasicircular, eccentric, or hyperbolic orbits. The model, called TEOBResumSGeneral, relies on the idea of incorporating general Newtonian prefactors, instead of the usual quasicircular ones, in both radiation reaction and waveform. The major advance with respect to previous work is that the quasicircular limit of the model is now correctly informed by numerical relativity (NR) quasicircular simulation. This provides EOB/NR unfaithfulness for the dominant quadrupolar waveform, calculated with Advanced LIGO noise, at most of the order of 1% over a meaningful portion of the quasicircular NR simulations computed by the Simulating eXtreme Spacetime (SXS) collaboration. In the presence of eccentricity, the model is similarly NR-faithful, ≤1%, all over the 28 public SXS NR datasets, with initial eccentricity up to ≃0.2, mass ratio up to q = 3 and dimensionless spin magnitudes as large as +0.7. Higher multipoles, up to l = 5 are also reliably modeled through the eccentric inspiral, plunge, merger and ringdown. For hyperbolic-like configurations, we also show that the EOB computed scattering angle is in excellent agreement with all currently available NR results.
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