Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2008-05-07
Phys.Rev.D78:044024,2008
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
25 pages, 5 figures, revtex4; transformations under rotations generalized to all values of l; to appear on Phys. Rev. D
Scientific paper
10.1103/PhysRevD.78.044024
We study the transformation of multipolar decompositions of gravitational radiation under rotations and boosts. Rotations to the remnant black hole's frame simplify the waveforms from the merger of generic spinning black hole binaries. Boosts may be important to get an accurate gravitational-wave phasing, especially for configurations leading to large recoil velocities of the remnant. As a test of our formalism we revisit the classic problem of point particles falling into a Schwarzschild black hole. Then we highlight by specific examples the importance of choosing the right frame in numerical simulations of unequal-mass, spinning binary black-hole mergers.
Berti Emanuele
Cardoso Vitor
Gualtieri Leonardo
Sperhake Uli
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