Triangular solution to the planar elliptic three-body problem in the parametrized post-Newtonian formalism

Abstract

A triangular solution [Phys. Rev. D 107, 044005 (2023)] has recently been found to the planar circular three-body problem in the parametrized post-Newtonian (PPN) formalism, for which they focus on a class of fully conservative theories characterized by the Eddington-Robertson parameters $\beta$ and $\gamma$. The present paper extends the PPN triangular solution to quasi-elliptic motion, for which the shape of the triangular configuration changes with time at the PPN order. The periastron shift due to the PPN effects is also obtained.

5 pages, 2 figures, text improved for clarity, accepted for PRD

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