Synchrotron radiation from cosmic string wakes

TL;DR

This paper explores how cosmic string wakes generate magnetic fields and synchrotron radiation, potentially explaining some unidentified astrophysical sources across various frequencies.

Contribution

It introduces a model for synchrotron emission from cosmic string wakes, linking cosmic string physics to observable astrophysical phenomena.

Findings

Magnetic fields are generated in cosmic string wakes via the Biermann mechanism.

Relativistic particles emit broad-spectrum synchrotron radiation in these wakes.

The emission spectrum can match some unidentified sources in current catalogs.

Abstract

Magnetic fields can be generated in cosmic string wakes due to the Biermann mechanism in the presence of neutrino inhomogeneities. As the cosmic string moves through the plasma the small magnetic field is amplified by the turbulence in the plasma. Relativistic charged particles which cross the magnetized wake of a cosmic string will therefore emit synchrotron radiation. The opening angle of the cosmic string is very small and so the wake appears like a relativistic jet. Assuming a homogeneous magnetic field in the wake of the string, we obtain the synchrotron emission from non thermal relativistic electrons in the wake of the string. The emitted radiation has a broad peak and is over a wide range of frequency. We show that the spectrum can be mapped to some of the unknown sources in different ranges of the current available catalogues.