The shear-induced alpha-effect and long-term variations in solar dynamo

TL;DR

This paper investigates how shear-induced alpha effects influence long-term solar magnetic activity and explores their impact on solar luminosity and radius variations using a comprehensive axisymmetric dynamo model.

Contribution

It introduces a self-consistent axisymmetric dynamo model that incorporates shear-induced alpha effects and examines their role in long-term solar magnetic and structural variations.

Findings

Shear contributions can complicate magnetic activity cycles.

Long-term magnetic variations affect solar luminosity.

Differential rotation behavior is influenced by shear-induced effects.

Abstract

The consequences of the shear-induced alpha effect to the long-term modulation of magnetic activity are examined with the help of the axisymmetric numerical dynamo model that includes the self-consistent description of the angular momentum balance, heat transport and magnetic field generation in the spherical shell. We find that the shear contributions to alpha effect can complicate the long-term behaviour of the large-scale magnetic activity and differential rotation in nonlinear dynamo. Additionally we consider the impact secular magnetic activity variations to the secular modulations of the solar luminosity and radius.