The dynamic activity of stars such as the Sun influences (exo) planetary space environments
through modulation of stellar radiation, plasma wind, particle and magnetic fluxes. Energetic …

A review of solar cycle prediction methods and their performance is given, including early
forecasts for Cycle 25. The review focuses on those aspects of the solar cycle prediction …

We use the anelastic spherical harmonic code to model the convective dynamo of solar-type
stars. Based on a series of 15 3D MHD simulations spanning four bins in rotation and mass …

Abstract The Committee on Space Research (COSPAR) is updating its Roadmap on Space
Weather. As input for this update, the COSPAR International Space Weather Action Teams …

The 11-year activity cycle is a dominant characteristic of the Sun. It is the result of the
evolution in time the solar dynamo that generates the solar magnetic field. The nearly …

The review summarises recent theoretical achievements and observational manifestations
of a new, recently discovered type of nonlinear oscillations in multi-component plasmas …

The level of solar magnetic activity, as exemplified by the number of sunspots and by
energetic events in the corona, varies on a wide range of timescales. Most prominent is the …

Context. Two candidate mechanisms have recently been considered with regard to the
nonlinear modulation of solar cycle amplitudes. Tilt quenching (TQ) comprises the negative …

Studying the hemispheric distribution of active regions (ARs) with different magnetic
morphologies may clarify the features of the dynamo process that is hidden under the …

Recent observations have revealed the surprising breakdown of stellar gyrochronology
relations at about the age of the Sun hinting the middle-aged, solar-like stars transition to a …