On the global magnetic activity and dynamo of the Sun and solar-type stars

TL;DR

This paper investigates the magnetic activity cycles of the Sun and solar-type stars, revealing key dependencies related to rotation, cycle durations, and effective temperatures, explained by internal Rossby waves.

Contribution

It identifies new power-law dependencies between stellar rotation, activity cycle durations, and effective temperatures, linked to internal Rossby waves.

Findings

Discovered relationships between rotation periods and effective temperatures.

Established correlations between cycle durations and effective temperatures.

Proposed internal Rossby waves as the physical mechanism behind these dependencies.

Abstract

The activity of the Sun as a result of cyclic changes of the global magnetic field is studied. As a consequence of the analysis of magnetic activity of solar-type stars the following power dependencies were found: the dependence between the rotation periods and the effective temperatures, the dependence between the duration of the "11-year" cycles of activity and the effective temperatures, and the dependence between the duration of quasi-biennial cycles and the effective temperatures. It is shown that the physical nature of these dependencies associated with the observed properties of solar-type stars and can be explained by the existence of internal Rossby waves around the base of convective shells of these stars.