A theoretical model of torsional oscillations from a flux transport dynamo model

TL;DR

This paper presents a theoretical model explaining torsional oscillations in the Sun as driven by magnetic Lorentz forces within a flux transport dynamo framework, accounting for their early high-latitude initiation before sunspot cycle onset.

Contribution

It introduces a flux transport dynamo-based theoretical model that explains the initiation and behavior of torsional oscillations in the Sun.

Findings

Torsional oscillations are driven by Lorentz forces in the model.

Oscillations begin at high latitudes before sunspot cycle starts.

The model aligns with observed early high-latitude oscillation onset.

Abstract

Assuming that the torsional oscillation is driven by the Lorentz force of the magnetic field associated with the sunspot cycle, we use a flux transport dynamo to model it and explain its initiation at a high latitude before the beginning of the sunspot cycle.