Quasi-local linear momentum in black-hole binaries

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Title: Quasi-local linear momentum in black-hole binaries
Author: Krishnan, Badri; Lousto, Carlos; Zlochower, Yosef
Abstract: We propose a quasi-local formula for the linear momentum of black-hole horizons inspired by the formalism of quasi-local horizons. We test this formula using two complementary configurations: (i) by calculating the large orbital linear momentum of the two black holes in an unequal-mass, zero-spin, quasi-circular binary and (ii) by calculating the very small recoil momentum imparted to the remnant of the head-on collision of an equal-mass, anti-aligned-spin binary. We obtain results consistent with the horizon trajectory in the orbiting case, and consistent with the net radiated linear momentum for the much smaller head-on recoil velocity.
Description: Also archived in arXiv:0707.0876 v2 Oct 1, 2007
Record URI: http://hdl.handle.net/1850/8331
Date: 2007-10-11

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