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Equation of motion for relativistic compact binaries with the strong field point particle limit: Third post-Newtonian order

Itoh, Y. (2004). Equation of motion for relativistic compact binaries with the strong field point particle limit: Third post-Newtonian order. Physical Review D, 69(6): 064018.

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Genre: Journal Article

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59645.pdf (Preprint), 537KB
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Creators:
Itoh, Yousuke1, Author
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1Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013

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Abstract: An equation of motion for relativistic compact binaries is derived through the third post-Newtonian (3 PN) approximation of general relativity. The strong field point particle limit and multipole expansion of the stars are used to solve iteratively the harmonically relaxed Einstein equations. We take into account the Lorentz contraction on the multipole moments defined in our previous works. We then derive a 3 PN acceleration of the binary orbital motion of the two spherical compact stars based on a surface integral approach which is a direct consequence of local energy momentum conservation. Our resulting equation of motion admits a conserved energy (neglecting the 2.5 PN radiation reaction effect), is Lorentz invariant and is unambiguous: there exist no undetermined parameter reported in the previous works. We shall show that our 3 PN equation of motion agrees physically with the Blanchet and Faye 3 PN equation of motion if $\lambda = - 1987/3080$, where $\lambda$ is the parameter which is undetermined within their framework. This value of $\lambda$ is consistent with the result of Damour, Jaranowski, and Schäfer who first completed a 3 PN iteration of the ADM Hamiltonian in the ADMTT gauge using the dimensional regularization.

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Language(s): eng - English
Dates: 2004-03
Publication Status: Published in print
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Identifiers: eDoc: 59645
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### Source 1

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Title: Physical Review D
Source Genre: Journal
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Pages: - Volume / Issue: 69 (6) Sequence Number: 064018 Start / End Page: - Identifier: -