Context. The third Gaia data release (DR3) provides a wealth of new data products. The
early part of the release, Gaia EDR3, already provided the astrometric and photometric data …

We present results of the largest, most comprehensive study ever done of the stellar
multiplicity of the most common stars in the Galaxy, the red dwarfs. We have conducted an …

Context. PIONIER stands for Precision Integrated-Optics Near-infrared Imaging ExpeRiment.
It combines four 1.8 m Auxilliary Telescopes or four 8m Unit Telescopes of the Very Large …

We present the first asteroseismic results for δ Scuti and γ Doradus stars observed in
Sectors 1 and 2 of the TESS mission. We utilize the 2-min cadence TESS data for a sample …

We present the discovery from Transiting Exoplanet Survey Satellite (TESS) data of LTT
1445Ab. At a distance of 6.9 pc, it is the second nearest transiting exoplanet system found to …

We know little about the outermost exoplanets in planetary systems because our detection
methods are insensitive to moderate-mass planets on wide orbits. However, debris discs …

Abstract The Milky Way Galaxy has an age of about 13 billion years. Solar-type stars evolve
all the long way to the realm of degenerate objects on essentially this time-scale. This, as …

Context. Barium and S stars without technetium are red giants and are suspected of being
members of binary systems due to their overabundances in heavy elements. These …

This fifth in a series of papers finishes the model atmosphere analyses of an unbiased,
volume-complete sample of more than 300 nearby solar-type stars. The sample first …

We investigated almost 500 stars distributed among 193 binary or multiple systems made of
late-F, G-, or early-K-primaries and late-K-or M-dwarf companion candidates. For all of them …