Strong solar flares and coronal mass ejections, here defined not only as the bursts of
electromagnetic radiation but as the entire process in which magnetic energy is released …

Several recent advances in turbulent dynamo theory are reviewed. High resolution
simulations of small-scale and large-scale dynamo action in periodic domains are compared …

Recent progress in astrophysical hydromagnetic turbulence is being reviewed. The physical
ideas behind the now widely accepted Goldreich–Sridhar model and its extension to …

Mean-field dynamo theory has important applications in solar physics and galactic
magnetism. We discuss some of the many turbulence effects relevant to the generation of …

Recent advances in mean-field theory are reviewed and applications to the Sun, late-type
stars, accretion disks, galaxies and the early Universe are discussed. We focus particularly …

A brief summary of the various observations and constraints that underlie solar dynamo
research are presented. The arguments that indicate that the solar dynamo is an alpha …

The effects of a non-gradient flux term originating from the motion of convective elements
with entropy perturbations of either sign are investigated and incorporated into a modified …

Our theoretical and numerical analysis have suggested that for low-mass main sequences
stars (of the spectral classes from M5 to G0) rotating much faster than the Sun, the generated …

Context. Observations of cool stars reveal dark spot-like features on their surfaces. These
starspots can be more extended than sunspots and cover a large area of the stellar surface …

We report the spontaneous formation of bipolar magnetic structures in direct numerical
simulations of stratified forced turbulence with an outer coronal envelope. The turbulence is …