Magnetic fields play a fundamental role for interior and atmospheric properties of M dwarfs
and greatly influence terrestrial planets orbiting in the habitable zones of these low-mass …

Cool stars like the Sun harbor convection zones capable of producing substantial surface
magnetic fields leading to stellar magnetic activity. The influence of stellar parameters like …

There is a large change in surface rotation rates of sun-like stars on the pre-main sequence
and early main sequence. Since these stars have dynamo-driven magnetic fields, this …

We present the first investigation of the structure of the stellar surface magnetic field using
line profiles in all four Stokes parameters. We extract the information about the magnetic …

Context. The long-term monitoring of magnetic cycles in cool stars is a key diagnostic in
understanding how dynamo generation and amplification of magnetic fields occur in stars …

Context. The brightest magnetic chemically peculiar stars θ Aur and ε UMa were targeted by
numerous studies of their photometric and spectroscopic variability. Detailed maps of …

Magnetic fields are ubiquitous in active cool stars, but they are in general complex and
weak. Current Zeeman Doppler imaging (ZDI) studies of cool star magnetic fields chiefly …

We report results of a spectropolarimetric and photometric monitoring of the weak-line T
Tauri star LkCa 4 within the Magnetic Topologies of Young Stars and the Survival of close-in …

Aims. In a follow-up investigation we present Zeeman-Doppler maps of the weak-lined T
Tauri star (WTTS) V410 Tau. As a rapid rotating star and a typical WTTS the stellar surface of …

The early-type chemically peculiar stars often show strong magnetic fields on their surfaces.
These magnetic topologies are organized on large scales and are believed to be close to an …