Large-scale magnetic fields in cosmology

TL;DR

This paper reviews the current understanding of large-scale magnetic fields in cosmology, discussing their origins, evolution, and impact on the universe's structure, highlighting challenges and open questions in primordial magnetism.

Contribution

It provides a comprehensive overview of early magnetogenesis theories and their implications for large-scale structure formation, identifying key advantages and limitations.

Findings

Primordial magnetism has unresolved issues and challenges.

Magnetic fields influence linear structure formation.

Early magnetogenesis theories have specific advantages and shortcomings.

Abstract

Despite the widespread presence of magnetic fields, their origin, evolution and role are still not well understood. Primordial magnetism sounds appealing but is not problem free. The magnetic implications for the large-scale structure of the universe still remain an open issue. This paper outlines the advantages and shortcomings of early-time magnetogenesis and the typical role of B-fields in linear structure-formation scenarios.