Young and directly imaged exoplanets offer critical tests of planet-formation models that are
not matched by radial velocity surveys of mature stars. These targets have been extremely …

Abstract Epsilon Aurigae (ε Aur) is a visually bright, eclipsing binary star system with a
period of 27.1 years. The cause of each 18-month-long eclipse has been a subject of …

Context. Recently, an increasing number of scientific publications making use of images
obtained with near-infrared long-baseline interferometry have been produced. The …

Using kilometric arrays of air Cherenkov telescopes at short wavelengths, intensity
interferometry may increase the spatial resolution achieved in optical astronomy by an order …

Context. Empirical evidence for the involvement of nonradial pulsations (NRPs) in the mass
loss from Be stars ranges from (i) a singular case (μ Cen) of repetitive mass ejections …

With its unprecedented light-collecting area for night-sky observations, the Cherenkov
Telescope Array (CTA) holds great potential for also optical stellar astronomy, in particular …

We present the results of a multiplicity survey for a magnitude-limited sample of 31 classical
Be stars conducted with the Navy Precision Optical Interferometer and the Mark III Stellar …

The very long baseline interferometer (VLBI) can achieve the highest angular resolution
imaging of any telescope at radio wavelengths using thousand-kilometre baselines. The …

Aims. We aim to measure very precise and accurate model-independent masses and
distances of detached binary stars. Precise masses at the< 1% level are necessary to test …

Algol (β Per) is an extensively studied hierarchical triple system whose inner pair is a
prototype semi-detached binary with mass transfer occurring from the sub-giant secondary …