Magnetic storms on stars manifest as remarkable, randomly occurring changes of the
luminosity over durations that are tiny in comparison to the normal evolution of stars. These …

We review the state of the art of three dimensional numerical simulations of solar and stellar
dynamos. We summarize fundamental constraints of numerical modelling and the …

The ultraviolet (UV) emission of stellar flares may have a pivotal role in the habitability of
rocky exoplanets around low-mass stars. Previous studies have used white-light …

Off-centred dipole configurations have been suggested to explain different phenomena in
neutron stars, such as natal kicks, irregularities in polarization of radio pulsars and …

Context. Main-sequence late-type stars with masses of less than 0.35 M⊙ are fully
convective. Aims. The goal is to study convection, differential rotation, and dynamos as …

We report the discovery of two new exoplanet systems around fully convective stars, found
from the radial-velocity (RV) variations of their host stars measured with the nIR …

Aims. The aim of this study is to explore the magnetic and flow properties of fully convective
M dwarfs as a function of rotation period P rot and magnetic Reynolds Re M and Prandlt …

Context. Early-type stars have convective cores due to a steep temperature gradient
produced by the CNO cycle. These cores can host dynamos and the generated magnetic …

HISPEC is a new, high-resolution near-infrared spectrograph being designed for the WM
Keck II telescope. By offering single-shot, R 100,000 spectroscopy between 0.98–2.5 μm …

Our theoretical and numerical analysis have suggested that for low-mass main sequences
stars (of the spectral classes from M5 to G0) rotating much faster than the Sun, the generated …