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- W2022356578 abstract "We make a comparison between results from numerically generated, quasiequilibrium configurations of compact binary systems of black holes in close orbits, and results from the post-Newtonian (PN) approximation. The post-Newtonian results are accurate through third PN order $[{O(v/c)}^{6}$ beyond Newtonian gravity], and include rotational and spin-orbit effects, but are generalized to permit orbits of nonzero eccentricity. Both treatments ignore gravitational radiation reaction. The energy E and angular momentum J of a given configuration are compared between the two methods as a function of the orbital angular frequency $ensuremath{Omega}.$ For small $ensuremath{Omega},$ corresponding to orbital separations a factor of two larger than that of the innermost stable orbit, we find that, if the orbit is permitted to be slightly eccentric, with e ranging from $ensuremath{approx}0.03$ to $ensuremath{approx}0.05,$ and with the two objects initially located at the orbital apocenter (maximum separation), our PN formulas give much better fits to the numerically generated data than do any circular-orbit PN methods, including various ``effective one-body'' resummation techniques. We speculate that the approximations made in solving the initial value equations of general relativity numerically may introduce a spurious eccentricity into the orbits." @default.
- W2022356578 created "2016-06-24" @default.
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- W2022356578 date "2002-11-18" @default.
- W2022356578 modified "2023-10-17" @default.
- W2022356578 title "Numerically generated quasiequilibrium orbits of black holes: Circular or eccentric?" @default.
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- W2022356578 doi "https://doi.org/10.1103/physrevd.66.101501" @default.
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