On the turbulent sources of the solar dynamo

TL;DR

This paper explores multiple turbulent mechanisms, including alpha, Omega x J, and shear-current effects, that could generate the Sun's large-scale magnetic field, improving the understanding of solar dynamo models.

Contribution

It demonstrates that additional turbulent effects can generate the solar magnetic field, addressing limitations of traditional mean-field dynamo models.

Findings

Large-scale poloidal field can be generated by alpha, Omega x J, and shear-current effects.

Including these effects alleviates known issues in solar dynamo models.

Multiple turbulent sources contribute to the solar magnetic field generation.

Abstract

We revisit the possible turbulent sources of the solar dynamo. Studying axisymmetric mean-field dynamo models, we find that the large-scale poloidal magnetic field could be generated not only by the famous alpha effect, but also by the Omega x J and shear-current effects. The inclusion of these additional turbulent sources alleviates several of the known problems of solar mean-field dynamo models.