Astrophysical plasmas have the remarkable ability to preserve magnetic topology, which
inevitably gives rise to the accumulation of magnetic energy within stressed regions …

The Sun is magnetically active and often produces eruptive events on different energetic
and temporal scales. Until recently, the upper limit of such events was unknown and …

High-resolution UV spectra of stellar H i Lyα lines from the Hubble Space Telescope (HST)
provide observational constraints on the winds of coronal main-sequence stars, thanks to an …

Strong solar flares and coronal mass ejections, here defined not only as the bursts of
electromagnetic radiation but as the entire process in which magnetic energy is released …

The Sun, as an active star, is the driver of energetic phenomena that structure interplanetary
space and affect planetary atmospheres. The effects of Space Weather on Earth and the …

This review article summarizes the advancement in the studies of Earth-affecting solar
transients in the last decade that encompasses most of solar cycle 24. It is a part of the effort …

Magnetic fields play a fundamental role in the structure and dynamics of the solar corona. As
they are driven by their footpoint motions on the solar surface, which transport energy from …

Solar flares are highly energetic events in the Sun's corona that affect Earth's space weather.
The mechanism that drives the onset of solar flares is unknown, hampering efforts to forecast …

Over the last decade there has been mounting evidence that the strength of the Sun's polar
magnetic fields during a solar cycle minimum is the best predictor of the amplitude of the …

We present a statistical analysis of solar coronal mass ejections (CMEs) based on 23 years
of quasi-continuous observations with the LASCO coronagraph, thus covering two complete …