Stars with a Stable Magnetic Field

TL;DR

This review discusses the origins and evolution of magnetic fields in stars, exploring whether they are fossil remnants or generated dynamically during stellar evolution or merging events.

Contribution

It synthesizes current understanding of stellar magnetic field origins, comparing fossil and dynamo theories and their implications across stellar life stages.

Findings

Magnetic flux may be conserved from pre-main sequence to compact star phases.

Dynamo processes could generate magnetic fields during certain stellar evolution stages.

Stellar merging events might also produce significant magnetic fields.

Abstract

In this review, I will summarise what we know about magnetic fields in stars and what the origin of these magnetic fields may be. I will address the issue of whether the magnetic flux is conserved from pre-main sequence to the compact star phase (fossil field origin) or whether fields may be dynamo generated during some stages of stellar evolution or perhaps during stellar merging events.