Linear momentum flux from inspiralling compact binaries in quasi-elliptical orbits at 2.5 Post-Newtonian order

TL;DR

This paper calculates the linear momentum flux due to gravitational waves from inspiralling compact binaries in quasi-elliptical orbits at 2.5 Post-Newtonian order, providing insights into recoil effects and momentum loss.

Contribution

It introduces a 2.5 Post Newtonian quasi-Keplerian framework for computing linear momentum flux in inspiralling binaries with elliptical orbits, including a closed-form expression for accumulated momentum.

Findings

Derived linear momentum flux accurate to first order in eccentricity.

Provided a closed-form expression for total momentum emitted over binary evolution.

Enhanced understanding of recoil effects in elliptical orbit inspirals.

Abstract

Emission of anisotropic gravitational radiation from compact binary system leads to a flux of linear momentum. This results in the recoil of the system. We investigate the rate of loss of Linear momentum flux in the far zone of the source using various mass type and current type multipole moments for inspiralling compact binary mergers in quasi-elliptical orbits at 2.5 Post Newtonian order. We compute the linear momentum flux accurate up to $\mathcal{O}(e_t)$ in harmonic coordinate. A 2.5 Post Newtonian Quasi-Keplarian representation of the parametric solution to the Post Newtonian equation of motion for the compact binary system has been adopted here. We also provide a closed-form expression for the accumulated linear momentum from the remote past through the binary evolution.