▪ Abstract Until the late 1990s the rich Hyades and the sparse UMa clusters were the only
coeval, comoving concentrations of stars known within 60 pc of Earth. Both are hundreds of …

Context. Young circumstellar disks are the birthplaces of planets. Their study is of prime
interest to understand the physical and chemical conditions under which planet formation …

We present results of a spectroscopic survey for new K-and M-type members of Scorpius–
Centaurus (Sco–Cen), the nearest OB Association (∼ 100–200 pc). Using an X-ray, proper …

We present a substantial extension of the millimeter (mm) wave continuum photometry
catalog for circumstellar dust disks in the Taurus star-forming region, based on a new" …

A comprehensive census of the stellar content of the OB associations within 1 kpc from the
Sun is presented, based on Hipparcos positions, proper motions, and parallaxes. It is a key …

We report results from a high-resolution optical spectroscopic survey aimed to search for
nearby young associations and young stars among optical counterparts of ROSAT All-Sky …

We present a new method based on a Bayesian analysis to identify new members of nearby
young kinematic groups. The analysis minimally takes into account the position, proper …

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 analyze the accretion properties of 21 low-mass T Tauri stars using a data set of
contemporaneous near-UV (NUV) through optical observations obtained with the Hubble …

The isolated, young, sunlike star TW Hya and four other young stars in its vicinity are strong
x-ray sources. Their similar x-ray and optical properties indicate that the stars make up a …