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  Gravitational spin-orbit and aligned spin1-spin2 couplings through third-subleading post-Newtonian orders

Antonelli, A., Kavanagh, C., Khalil, M., Steinhoff, J., & Vines, J. (2020). Gravitational spin-orbit and aligned spin1-spin2 couplings through third-subleading post-Newtonian orders. Physical Review D, 102(12): 124024. doi:10.1103/PhysRevD.102.124024.

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 Creators:
Antonelli, Andrea1, Author              
Kavanagh, Chris1, Author              
Khalil, Mohammed1, Author              
Steinhoff, Jan1, Author              
Vines, Justin1, Author              
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1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc
 Abstract: The study of scattering encounters continues to provide new insights into the general relativistic two-body problem. The local-in-time conservative dynamics of an aligned-spin binary, for both unbound and bound orbits, is fully encoded in the gauge-invariant scattering-angle function, which is most naturally expressed in a post-Minkowskian (PM) expansion, and which exhibits a remarkably simple dependence on the masses of the two bodies (in terms of appropriate geometric variables). This dependence links the PM and small-mass-ratio approximations, allowing gravitational self-force results to determine new post-Newtonian (PN) information to all orders in the mass ratio. In this paper, we exploit this interplay between relativistic scattering and self-force theory to obtain the third-subleading (4.5PN) spin-orbit dynamics for generic spins, and the third-subleading (5PN) spin$_1$-spin$_2$ dynamics for aligned spins. We further implement these novel PN results in an effective-one-body framework, and demonstrate the improvement in accuracy by comparing against numerical-relativity simulations.

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 Dates: 2020-10-022020-10-152020
 Publication Status: Published in print
 Pages: 29 pages, 2 figures, supplemental material; v2: added references
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 Table of Contents: -
 Rev. Type: -
 Identifiers: arXiv: 2010.02018
DOI: 10.1103/PhysRevD.102.124024
 Degree: -

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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : American Physical Society
Pages: - Volume / Issue: 102 (12) Sequence Number: 124024 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: https://pure.mpg.de/cone/journals/resource/111088197762258