Magnetic Fields In Astrophysical Objects

TL;DR

This paper reviews recent developments in understanding magnetic fields in astrophysical objects, emphasizing their potential significance even when weak, across stars, planets, and accretion discs, and highlights future research questions.

Contribution

It synthesizes recent findings on the importance of weak magnetic fields in various astrophysical bodies, challenging previous assumptions of their insignificance.

Findings

Weak magnetic fields can significantly influence astrophysical phenomena.

Magnetic fields are crucial in the dynamics of stars, planets, and accretion discs.

Future research questions are identified for further exploration.

Abstract

Magnetic fields are known to reside in many astrophysical objects and are now believed to be crucially important for the creation of phenomena on a wide variety of scales. However, the role of the magnetic field in the bodies that we observe has not always been clear. In certain situations, the importance of a magnetic field has been over looked on the grounds that the large-scale magnetic field was believed to be too weak to play and important role in the dynamics. In this article I discuss some of the recent developments concerning magnetic fields in stars, planets and accretion discs. I choose to emphasise some of the situations where it has been suggested that weak magnetic fields may play a more significant role than previously thought. At the end of the article I list some of the questions to be answered in the future.