Until the last few decades, investigations of stellar interiors had been restricted to theoretical
studies only constrained by observations of their global properties and external …

Abstract Study Analysis Group 21 (SAG21) of NASA's Exoplanet Exploration Program
Analysis Group was organized to study the effect of stellar contamination on space-based …

We use the anelastic spherical harmonic code to model the convective dynamo of solar-type
stars. Based on a series of 15 3D MHD simulations spanning four bins in rotation and mass …

The magnetic activity of the Sun and other stars causes their brightness to vary. We
investigated how typical the Sun's variability is compared with other solar-like stars, ie, those …

We observed two transits of the iconic gas giant HD 209458b between 380 and 780 nm,
using the high-resolution ESPRESSO spectrograph. The derived planetary transmission …

The Sun's axisymmetric large-scale flows, differential rotation and meridional circulation, are
thought to be maintained by the influence of rotation on the thermal-convective motions in …

The rotation rates and magnetic activity of Sun-like and low-mass (≲ 1.4M⊙) main-
sequence stars are known to decline with time, and there now exist several models for the …

Magnetic features on the surface of stars, such as spots and faculae, cause stellar spectral
variability on time-scales of days and longer. For stars other than the Sun, the spectral …

The magnetic field of the Sun is generated by internal dynamo process with a cyclic period
of 11 years or a 22 year magnetic cycle. The signatures of the Sun's magnetic cycle are …

Context. The presence and strength of a stellar magnetic field and activity is rooted in a star's
fundamental parameters such as mass and age. Can flares serve as an accurate stellar …