The Sun and other stars are magnetic: magnetism pervades their interiors and affects their
evolution in a variety of ways. In the Sun, both the fields themselves and their influence on …

Magnetic fields are present in a wide variety of stars throughout the HR diagram and play a
role at basically all evolutionary stages, from very-low-mass dwarfs to very massive stars …

Context. Least-squares deconvolution (LSD) is a powerful method of extracting high-
precision average line profiles from the stellar intensity and polarization spectra. This …

Some main-sequence stars of spectral type A are observed to have a strong (0.03–3 tesla),
static, large-scale magnetic field, of a chiefly dipolar shape: they are known as 'Ap stars' …

Numerous magnetic hot stars exhibit gyrosynchrotron radio emission. The source electrons
were previously thought to be accelerated to relativistic velocities in the current sheet formed …

Abstract The Mars Exploration Rover Opportunity identified the ferric sulphate mineral
jarosite and possible relicts of gypsum at the Meridiani Planum landing site. On Earth …

Context. Some Ap stars that have a strong enough magnetic field and a sufficiently low v sini
show spectral lines resolved into their magnetically split components. Aims. We present the …

Context. The evolution of magnetic fields in Ap stars during the main sequence phase is
presently mostly unconstrained by observation because of the difficulty of assigning …

Atomic diffusion is a fundamental physical process. Its universal presence is not questioned.
Yet, in stellar astrophysics it is often abusively ignored. Arguments that it plays a negligible …

Core convection and dynamo activity deep within rotating A-type stars of 2 M☉ are studied
with three-dimensional nonlinear simulations. Our modeling considers the inner 30% by …