This paper reviews recent advances and current debates in modeling the solar cycle as a
hydromagnetic dynamo process. Emphasis is placed on (relatively) simple dynamo models …

We describe the defining observations of the solar cycle that provide constraints for the
dynamo processes operating within the Sun. Specifically, we report on the following topics …

Aims. Solar Orbiter, the first mission of ESA's Cosmic Vision 2015–2025 programme and a
mission of international collaboration between ESA and NASA, will explore the Sun and …

Rapidly rotating fluids have a rotation profile that depends only on the distance from the
rotation axis, in accordance with the Taylor-Proudman theorem. Although the Sun was …

Abstract The Kodaikanal Observatory has provided long-term synoptic observations of
chromospheric activities in the Ca ii K line (393.34 nm) since 1907. This article investigates …

Can atmospheric waves in planet-hosting solar-like stars substantially resonate to tidal
forcing, perhaps at a level of impacting the space weather or even being dynamo-relevant …

Rossby waves arise in thin layers within fluid regions of stars and planets. These global
wave‐like patterns occur due to the variation in Coriolis forces with latitude. In the past …

We propose a self-consistent explanation of Rieger-type periodicities, the Schwabe cycle,
and the Suess-de Vries cycle of the solar dynamo in terms of resonances of various wave …

Global solar activity variation mainly occurs over about an 11 yr cycle. However, both longer
and shorter periodicities than the solar cycle are also present in many different solar activity …

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 …