▪ Abstract Observational studies of low-mass stars during their early stages of evolution, from
protostars through the zero-age main sequence, show highly elevated levels of magnetic …

▪ 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 …

BANYAN Σ is a new Bayesian algorithm to identify members of young stellar associations
within 150 pc of the Sun. It includes 27 young associations with ages in the range∼ 1–800 …

We present a self-consistent, absolute isochronal age scale for young (≲ 200 Myr), nearby
(≲ 100 pc) moving groups in the solar neighbourhood based on homogeneous fitting of …

Context. The global size and spatial distribution of dust is an important ingredient in the
structure and evolution of protoplanetary disks and in the formation of larger bodies, such as …

Estimates of the mass and age of young stars from their location in the HR diagram are
limited by not only the typical observational uncertainties that apply to field stars, but also by …

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 near-infrared (0.9–2.4 μm) spectroscopic study of 73 field ultracool dwarfs
having spectroscopic and/or kinematic evidence of youth (≈ 10–300 Myr). Our sample is …

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 …

Traditional thermal evolution models of giant planets employ arbitrary initial conditions
selected more for computational expediency than physical accuracy. Since the initial …