Gravitational Radiation from hyperbolic encounters in the presence of dark matter

TL;DR

This paper investigates gravitational waves from hyperbolic encounters of binaries influenced by dark matter, analyzing fluxes, orbital changes, and dynamical friction effects to understand their detectability and dynamics.

Contribution

It provides a systematic calculation of gravitational wave fluxes and binary dynamics considering dark matter effects, including dynamical friction and potential perturbations.

Findings

Dark matter influences gravitational wave fluxes from hyperbolic encounters.

Dark matter presence alters the orbital parameters and braking index of binaries.

The study offers a framework to analyze binary dynamics in dark matter environments.

Abstract

In this study, we look into binaries undergoing gravitational radiation during a hyperbolic passage. Such hyperbolic events can be a credible source of gravitational waves in future detectors. We systematically calculate fluxes of gravitational radiation from such events in the presence of dark matter with different profiles, also considering the effects of dynamical friction. We provide an estimate for the braking index and show how it evolves due to the presence of the dark matter medium. We also investigate the binary dynamics through the changes in the orbital parameters by treating the potential due to dark matter spike and the dynamical friction effects as a perturbation term. An insight into the effects of such a medium on the binaries from the corresponding osculating elements opens up avenues to study binary dynamics for such events.