A practical formula for the radiated angular momentum

Details A practical formula for the radiated angular momentum A practical formula for the radiated angular momentum

2007-03-09

arxiv.org/abs/gr-qc/0703061v2

Phys.Rev.D76:041502,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, revtex4, Accepted to PRD

Scientific paper

10.1103/PhysRevD.76.041502

We present a simple formula for the radiated angular momentum based on a spin-weighted spherical harmonic decomposition of the Weyl scalar psi_4 representing outgoing radiation in the Kinnersley tetrad. We test our formula by measuring the radiated angular momentum from three simulations of non-spinning equal-mass black-hole binary with orbital angular momentum aligned along the x, y, and z axes respectively. We find that the radiated angular momentum agrees with the differences in the remnant horizon spins and the initial angular momentum for each system.

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