Scattering of particles by neutron stars: Time-evolutions for axial perturbations

TL;DR

This paper investigates how scattered particles excite axial quasi-normal modes in relativistic stars by evolving time-dependent perturbation equations, providing insights into perturbative processes and testing nonlinear evolution results.

Contribution

It introduces a method to study particle scattering effects on relativistic stars' axial modes using time-dependent perturbation evolution, a novel approach in this context.

Findings

First step towards understanding particle capture and scattering by rotating stars

Provides a framework for testing nonlinear binary system evolution

Lays groundwork for future complex perturbative studies

Abstract

The excitation of the axial quasi-normal modes of a relativistic star by scattered particles is studied by evolving the time dependent perturbation equations. This work is the first step towards the understanding of more complicated perturbative processes, like the capture or the scattering of particles by rotating stars. In addition, it may serve as a test for the results of the full nonlinear evolution of binary systems.