We highlight some subtleties that affect naive implementations of quadrupolar and octupolar gravitational waveforms from numerically-integrated trajectories of three-body systems. Some of those subtleties arise from the requirement that the source be contained in its "coordinate near zone" when applying the standard PN formulae for gravitational-wave emission, and from the need to use the non-linear Einstein equations to correctly derive the quadrupole emission formula. We show that some of these subtleties were occasionally overlooked in the literature, with consequences for published results. We also provide prescriptions that lead to correct and robust predictions for the waveforms computed from numerically-integrated orbits.

About gravitational-wave generation by a three-body system / Bonetti, M.; Barausse, E.; Faye, G.; Haardt, F.; Sesana, A.. - In: CLASSICAL AND QUANTUM GRAVITY. - ISSN 0264-9381. - 34:21(2017), pp. 1-20. [10.1088/1361-6382/aa8da5]

About gravitational-wave generation by a three-body system

Barausse, E.;
2017

Abstract

We highlight some subtleties that affect naive implementations of quadrupolar and octupolar gravitational waveforms from numerically-integrated trajectories of three-body systems. Some of those subtleties arise from the requirement that the source be contained in its "coordinate near zone" when applying the standard PN formulae for gravitational-wave emission, and from the need to use the non-linear Einstein equations to correctly derive the quadrupole emission formula. We show that some of these subtleties were occasionally overlooked in the literature, with consequences for published results. We also provide prescriptions that lead to correct and robust predictions for the waveforms computed from numerically-integrated orbits.
34
21
1
20
215004
http://doi.org/10.1088/1361-6382/aa8da5
https://arxiv.org/abs/1707.04902
Bonetti, M.; Barausse, E.; Faye, G.; Haardt, F.; Sesana, A.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/89647
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