We trace the evolution of research on extreme solar and solar-terrestrial events from the
1859 Carrington event to the rapid development of the last twenty years. Our focus is on the …

The age of an individual star cannot be measured, only estimated through mostly model-
dependent or empirical methods, and no single method works well for a broad range of …

The high-energy emission from low-mass stars is mediated by the magnetic dynamo.
Although the mechanisms by which fully convective stars generate large-scale magnetic …

While the strong anticorrelation between chromospheric activity and age has led to the
common use of the Ca ii H and K emission index (R^{\prime} _ {\mathrm {HK}\,}= L …

We propose a simple interpretation of the rotation period data for solar-and late-type stars.
The open cluster and Mount Wilson star observations suggest that rotating stars lie primarily …

ABSTRACT Young (125 Myr), populous (> 1000 members), and relatively nearby, the
Pleiades has provided an anchor for stellar angular momentum models for both younger …

We have obtained high resolution spectra for a volume-limited sample of 118 field M dwarfs.
From these observations we derive projected rotational velocities and fluxes in the H_alpha …

Solar-like stars (M≲ 1.3 M⊙) lose angular momentum through their magnetized winds. The
resulting evolution of the surface rotation period, which can be directly measured …

Understanding changes in the solar flux over geologic time is vital for understanding the
evolution of planetary atmospheres because it affects atmospheric escape and chemistry, as …

Ongoing studies in mathematical depth, and inferences fromhelioseismological'observations
of the internal solar rotation have shown up the limitations in our knowledge of the solar …