Astrometry in the 1960s and 1970s was still entirely ground-based, and all too often seen
(and experienced by very few) as a rather tedious, time-consuming technique that no longer …

The catalog of hierarchical stellar systems with three or more components is an update of
the original 1997 version. For 2000 hierarchies, the new Multiple Star Catalog (MSC) …

This is the first in a series of papers in which we describe and report the analysis of a large
survey of Herbig Ae/Be stars in circular spectropolarimetry. Using the ESPaDOnS and …

We have attempted to establish observational evidence for the presence of distant
companions that may have acquired and/or absorbed angular momentum during the …

We report the discovery of visual double stars, mostly with separations between 0.3 and 1
arcsec, from a dedicated re–reduction of the Tycho data from the star mapper of the ESA …

Abstract We have obtained Spitzer Space Telescope Infrared Spectrograph (IRS) 5.5-35 μm
spectra of 59 main-sequence stars that possess IRAS 60 μm excess. The spectra of five …

We present results from an adaptive optics survey for substellar and stellar companions to
Sun-like stars. The survey targeted 266 F5–K5 stars in the 3 Myr–3 Gyr age range with …

The results of speckle interferometric measurements of binary and multiple stars conducted
in 2008 and 2009 at the Blanco and SOAR 4 m telescopes in Chile are presented. A total of …

Utilizing Hipparcos parallaxes, original radial velocities and recent literature values, new Ca
II H and K emission measurements, literature-based abundance estimates, and updated …

The catalogue contains 199 confirmed cases of binary systems containing at least one
pulsating component of δ Sct type. The sample is divided into subgroups in order to describe …