Hunting down the cause of solar magnetism

TL;DR

This paper advances solar and stellar dynamo modeling by employing higher-resolution simulations with improved heat conduction, revealing significant changes in magnetic induction effects and paving the way for studying small- and large-scale dynamo interactions.

Contribution

It introduces the first test-field measurements from high-resolution, more realistic simulations, enhancing understanding of dynamo mechanisms in solar and stellar contexts.

Findings

Significant changes in inductive effect profiles observed.

Higher resolution simulations reveal more turbulent regimes.

Foundation laid for studying small- and large-scale dynamo interactions.

Abstract

To understand solar and stellar dynamos combining local and global numerical modelling with long-term observations is a challenging task: even with state of the art computational methods and resources, the stellar parameter regime remains unattainable. Our goal is to relax some approximations, in order to simulate more realistic systems, and try to connect the results with theoretical predictions and state-of-the-art observations. We present here the first test-field measurements from our higher-resolution runs with improved heat conduction description. They indicate significant changes in the profiles of the most crucial inductive effect related to solar and stellar dynamo mechanisms. Higher resolution runs, currently undertaken, will bring us into an even more turbulent regime, in which we will be able to study, for the first time, the interaction of small- and large-scale dynamos in a quantitative way.