Reducing eccentricity in black-hole binary evolutions with initial parameters from post-Newtonian inspiral

Husa, Sascha, Hannam, Mark ORCID: https://orcid.org/0000-0001-5571-325X, González, José, Sperhake, Ulrich and Brügmann, Bernd 2008. Reducing eccentricity in black-hole binary evolutions with initial parameters from post-Newtonian inspiral. Physical Review D 77 (4) , 044037. 10.1103/PhysRevD.77.044037

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Abstract

Standard choices of quasicircular orbit parameters for black-hole binary evolutions result in eccentric inspiral. We introduce a conceptually simple method, which is to integrate the post-Newtonian equations of motion through hundreds of orbits, and read off the values of the momenta at the separation at which we wish to start a fully general relativistic numerical evolution. For the particular case of nonspinning equal-mass inspiral with an initial coordinate separation of D=11M we show that this approach reduces the eccentricity by at least a factor of 5 to e<0.002 as compared to using standard quasicircular initial parameters.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Publisher:	American Physical Society
ISSN:	1550-7998
Last Modified:	20 Oct 2022 08:14
URI:	https://orca.cardiff.ac.uk/id/eprint/27658

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