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Circularization and Final Spin in Eccentric Binary Black Hole Inspirals

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arxiv 0710.5167 v2 pith:BQXW6N3O submitted 2007-10-26 gr-qc astro-ph

Circularization and Final Spin in Eccentric Binary Black Hole Inspirals

classification gr-qc astro-ph
keywords blackbinaryholespineccentricitiesfinalinitialinspirals
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present results from numerical relativity simulations of equal mass, non-spinning binary black hole inspirals and mergers with initial eccentricities e <= 0.8 and coordinate separations D >= 12 M of up to 9 orbits (18 gravitational wave cycles). We extract the mass M_f and spin a_f of the final black hole and find, for eccentricities e < 0.4, that a_f/M_f = 0.69 and M_f/M_adm = 0.96 are independent of the initial eccentricity, suggesting that the binary has circularized by the merger time. For e > 0.5, the black holes plunge rather than orbit, and we obtain a maximum spin parameter a_f/M_f = 0.72 around e = 0.5.

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Cited by 6 Pith papers

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