Magnetic Fields in Cosmic Voids

TL;DR

This paper investigates the properties and origins of magnetic fields in cosmic voids using the IllustrisTNG simulation, revealing that void magnetic fields retain primordial characteristics and galaxies in voids have weaker magnetic fields.

Contribution

It demonstrates that cosmic voids preserve primordial magnetic field properties and compares magnetic field strengths in galaxies across different environments.

Findings

Void magnetic fields reflect primordial properties.

Galaxies in voids have weaker magnetic fields.

Magnetic field evolution depends on environment.

Abstract

Magnetic fields are one of most concealed components of the universe. They are observed as part of the intergalactic medium and on galaxy cluster scales, however their origin and evolution is unclear. In this work we use the IllustrisTNG simulation to investigate the effects of magnetic fields in cosmic voids, the least dense regions of the universe. We find that, under the hypothesis of a uniform primordial magnetic field, the voids still reflect the primordial properties of the fields. On the other hand, the galaxies in their interior acquire weaker magnetic fields than galaxies in denser environments.