Solar flares are observed at all wavelengths from decameter radio waves to gamma-rays
beyond 1 GeV. This review focuses on recent observations in EUV, soft and hard X-rays …

In this review we give an overview about the current state-of-knowledge of the magnetic field
in sunspots from an observational point of view. We start by offering a brief description of …

Abstract Knowledge regarding the coronal magnetic field is important for the understanding
of many phenomena, like flares and coronal mass ejections. Because of the low plasma …

The solar atmosphere was traditionally represented with a simple one-dimensional model.
Over the past few decades, this paradigm shifted for the chromosphere and corona that …

The magnetic field of the Sun is the underlying cause of the many diverse phenomena
combined under the heading of solar activity. Here we describe the magnetic field as it …

Magnetism is one of the most pervasive features of the Universe, with planets, stars and
entire galaxies all having associated magnetic fields. All of these fields are generated by the …

This publication provides an overview of magnetic fields in the solar atmosphere with the
focus lying on the corona. The solar magnetic field couples the solar interior with the visible …

Abstract The Atacama Large Millimeter/submillimeter Array (ALMA) is a new powerful tool for
observing the Sun at high spatial, temporal, and spectral resolution. These capabilities can …

Velocity oscillations in sunspot umbrae have been measured simultaneously in two spectral
lines: the photospheric Si I λ10827 line and the chromospheric He I λ10830 multiplet. From …

The coronal magnetic field is an important quantity because the magnetic field dominates
the structure of the solar corona. Unfortunately, direct measurements of coronal magnetic …