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 …

The topology and dynamics of the three-dimensional magnetic field in the solar atmosphere
govern various solar eruptive phenomena and activities, such as flares, coronal mass …

Context. In order to better understand the underlying processes and prerequisites for solar
activity, it is essential to study the time evolution of the coronal magnetic field of solar active …

Recent advances in mean-field theory are reviewed and applications to the Sun, late-type
stars, accretion disks, galaxies and the early Universe are discussed. We focus particularly …

Context. The discovery of clear criteria that can deterministically describe the eruptive state
of a solar active region would lead to major improvements on space weather predictions …

Using multi-instrument and multiwavelength observations, we studied a coronal mass
ejection (CME) that led to an intense geomagnetic storm on 2023 April 23. The eruption …

In previous works, we introduced a nonlinear force-free method that self-consistently
calculates the instantaneous budgets of free magnetic energy and relative magnetic helicity …

Using the photospheric magnetic and coronal observations of Solar Dynamics Observatory,
we studied the buildup and eruption of coronal nonpotential magnetic structure in emerging …

Integrated precipitable water vapor (PWV) retrieved from Moderate Resolution Imaging
Spectro-radiometer (MODIS) in near-infrared channels is examined with the PWV estimated …

In this work we provide an updated description of the Vertical-Current Approximation
Nonlinear Force-Free Field (VCA-NLFFF) code, which is designed to measure the evolution …