Measuring coronal magnetic fields with remote sensing observations of shock waves

TL;DR

This paper reviews recent methods using remote sensing of shock waves to measure coronal magnetic fields, highlighting their potential and limitations for understanding solar eruptions across various distances and latitudes.

Contribution

It summarizes recent advancements in remote sensing techniques for coronal magnetic field measurement and discusses their strengths and weaknesses.

Findings

Remote sensing can estimate magnetic fields over large heliocentric distances.

Techniques have limitations in accuracy and spatial coverage.

The paper encourages further methodological improvements.

Abstract

Recent works demonstrated that remote sensing observations of shock waves propagating into the corona and associated with major solar eruptions can be used to derive the strength of coronal magnetic fields met by the shock over a very large interval of heliocentric distances and latitudes. This opinion article will summarize most recent results obtained on this topic and will discuss the weaknesses and strengths of these techniques to open a constructive discussion with the scientific community.