Reducing eccentricity in black-hole binary evolutions with initial parameters from post-Newtonian inspiral - General Relativity and Quantum CosmologyReport as inadecuate




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Abstract: Standard choices of quasi-circular orbit parameters for black-hole binaryevolutions result in eccentric inspiral. We introduce a conceptually simplemethod, which is to integrate the post-Newtonian equations of motion throughhundreds of orbits, and read off the values of the momenta at the separation atwhich we wish to start a fully general relativistic numerical evolution. Forthe particular case of non-spinning equal-mass inspiral with an initialcoordinate separation of $D = 11M$ we show that this approach reduces theeccentricity by at least a factor of five to $e < 0.002$ as compared to usingstandard quasi-circular initial parameters.



Author: Sascha Husa, Mark Hannam, Jose A. Gonzalez, Ulrich Sperhake, Bernd Bruegmann

Source: https://arxiv.org/



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