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Improvements to the construction of binary black hole initial data

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arxiv 1506.01689 v1 pith:6ESGUSKG submitted 2015-06-04 gr-qc

Improvements to the construction of binary black hole initial data

Serguei Ossokine , Francois Foucart , Harald P. Pfeiffer , Michael Boyle , B\'ela Szil\'agyi This is my paper
classification gr-qc
keywords datainitialblackbinaryholeconstructionabovecode
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Construction of binary black hole initial data is a prerequisite for numerical evolutions of binary black holes. This paper reports improvements to the binary black hole initial data solver in the Spectral Einstein Code, to allow robust construction of initial data for mass-ratio above 10:1, and for dimensionless black hole spins above 0.9, while improving efficiency for lower mass-ratios and spins. We implement a more flexible domain decomposition, adaptive mesh refinement and an updated method for choosing free parameters. We also introduce a new method to control and eliminate residual linear momentum in initial data for precessing systems, and demonstrate that it eliminates gravitational mode mixing during the evolution. Finally, the new code is applied to construct initial data for hyperbolic scattering and for binaries with very small separation.

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Cited by 2 Pith papers

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  1. Surrogate models for precessing binary black hole simulations with unequal masses

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    New surrogate models NRSur7dq4 and RemnantModel accurately predict waveforms and remnant properties for precessing unequal-mass binary black holes up to q=4, outperforming existing models by an order of magnitude.

  2. Biased parameter inference of eccentric, spin-precessing binary black holes

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    Eccentric BBH signals recovered with quasi-circular precessing models show biases in chirp mass and χ_p; Bayes factors favor eccentric aligned-spin models when both eccentricity and precession are present.