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A Post-Newtonian diagnostic of quasi-equilibrium binary configurations of compact objects

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arxiv gr-qc/0312082 v3 pith:ROCAZ6N2 submitted 2003-12-17 gr-qc

Thierry Mora , Clifford M. Will This is my paper · ORCID
classification gr-qc
keywords binarycompactconfigurationsdiagnosticneutronquasi-equilibriumstarsaccurate
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Using equations of motion accurate to the third post-Newtonian (3PN) order (O(v/c)^6 beyond Newtonian gravity), we derive expressions for the total energy E and angular momentum J of the orbits of compact binary systems (black holes or neutron stars) for arbitrary orbital eccentricity. We also incorporate finite-size contributions such as spin-orbit and spin-spin coupling, and rotational and tidal distortions, calculated to the lowest order of approximation, but we exclude the effects of gravitational radiation damping. We describe how these formulae may be used as an accurate diagnostic of the physical content of quasi-equilibrium configurations of compact binary systems of black holes and neutron stars generated using numerical relativity. As an example, we show that quasi-equilibrium configurations of corotating neutron stars recently reported by Miller et al. can be fit by our diagnostic to better than one per cent with a circular orbit and with physically reasonable tidal coefficients.

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Cited by 4 Pith papers

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