Solar quasi-biennial oscillations (QBOs) with the time scale of 0.6–4 yrs appear to be a basic
feature of the Sun's activity. Observational aspects of QBOs are reviewed on the basis of …

The seismic study of the Sun and other stars offers a unique window into the interior of these
stars. Thanks to helioseismology, we know the structure of the Sun to admirable precision. In …

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 …

Context. The study of stellar activity is important because it can provide new constraints for
dynamo models when combined with surface rotation rates and the depth of the convection …

The magnetic fields of solar-type stars are observed to cycle over decadal periods—11
years in the case of the Sun. The fields originate in the turbulent convective layers of stars …

We discuss how recent advances in observations, theory and numerical simulations have
allowed the stellar community to progress in its understanding of stellar convection, rotation …

Rossby waves are a pervasive feature of the large-scale motions of the Earth's atmosphere
and oceans. These waves (also known as planetary waves and r-modes) also play an …

Solar activity has significantly changed over the last two Schwabe cycles. After a long and
deep minimum at the end of Cycle 23, the weaker activity of Cycle 24 contrasts with the …

Continuous observations play an important role in the studies of solar variability. While such
observations can be achieved from space with an almost 100% duty cycle, it is difficult to …

The continuous photometric observations collected by the Kepler satellite over 4 yr provide a
wealth of data with an unequalled quantity and quality for the study of stellar evolution of …