Solar and Stellar Cycles

Solar and Stellar Coronae

The existence of hot coronae throughout the HR diagram has been proved by the observations of the Einstein observatory since the late 1970's This nding has stimulated a new interest in the study of stellar activity. The general picture relating stellar activity in late type stars to the internal generation, photospheric emergence, and chromospheric and coronal dissipation of magnetic elds, was ...

Stellar magnetic cycles

The solar activity cycle is a manifestation of the hydromagnetic dynamo working inside our star. The detection of activity cycles in solar-like stars and the study of their properties allow us to put the solar dynamo in perspective, investigating how dynamo action depends on stellar parameters and stellar structure. Nevertheless, the lack of spatial resolution and the limited time extension of ...

Session III Solar and stellar cycles and variability on century timescale

Observational data concerning the long-term history of cyclic solar activity as recorded in sunspot and isotopic data are discussed in the context of solar dynamo theory. In particular, a simple dynamo model based on differential rotation and the mirror asymmetry of convection with random fluctuations of dynamo governing parameters is shown to reproduce some basic features of the solar magnetic...

Modeling Solar and Stellar Flares

The Solar–Stellar Connection

The discovery that radio emission from stars is quite common and readily detectable was one of the unexpected advances produced by the Very Large Array [35,11]. This discovery could not be predicted based on what we know of the Sun’s radio emission, even though similar physical mechanisms are operating in stellar radio sources and so knowledge of the Sun’s emission is essential for understandin...