Magnetic fields in the first galaxies: Dynamo amplification and limits from reionization

TL;DR

This paper explores how small-scale dynamo processes could amplify magnetic fields in early galaxies and derives constraints on primordial magnetic field strengths based on reionization data.

Contribution

It provides new insights into magnetic field amplification mechanisms in the first galaxies and establishes limits on primordial fields from reionization observations.

Findings

Small-scale dynamo can efficiently amplify magnetic fields in early galaxies.

Constraints on primordial magnetic field strength are derived from reionization epoch data.

The study links magnetic field evolution to cosmic reionization history.

Abstract

We discuss the amplification of magnetic fields by the small-scale dynamo, a process that could efficiently produce strong magnetic fields in the first galaxies. In addition, we derive constraints on the primordial field strength from the epoch of reionization.