Radiation from low-momentum zoom-whirl orbits

Details Radiation from low-momentum zoom-whirl orbits Radiation from low-momentum zoom-whirl orbits

2009-11-19

arxiv.org/abs/0911.3862v2

Class.Quant.Grav.27:084035,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

9 pages, 6 figures, Amaldi8 conference proceedings as published

Scientific paper

10.1088/0264-9381/27/8/084035

We study zoom-whirl behaviour of equal mass, non-spinning black hole binaries in full general relativity. The magnitude of the linear momentum of the initial data is fixed to that of a quasi-circular orbit, and its direction is varied. We find a global maximum in radiated energy for a configuration which completes roughly one orbit. The radiated energy in this case exceeds the value of a quasi-circular binary with the same momentum by 15%. The direction parameter only requires minor tuning for the localization of the maximum. There is non-trivial dependence of the energy radiated on eccentricity (several local maxima and minima). Correlations with orbital dynamics shortly before merger are discussed. While being strongly gauge dependent, these findings are intuitive from a physical point of view and support basic ideas about the efficiency of gravitational radiation from a binary system.

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