Whether the stellar initial mass function (IMF) is universal or is instead sensitive to
environmental conditions is of critical importance: The IMF influences most observable …

The age of an individual star cannot be measured, only estimated through mostly model-
dependent or empirical methods, and no single method works well for a broad range of …

We present an analysis of the intrinsic colors and temperatures of 5–30 Myr old pre-main-
sequence (pre-MS) stars using the F0-through M9-type members of nearby, negligibly …

The mass accretion rate, Ṁ acc, is a key quantity for the understanding of the physical
processes governing the evolution of accretion discs around young low-mass (M⋆≲ 2.0 …

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 present VLT/X-shooter observations of a sample of 36 accreting low-mass stellar and
substellar objects (YSOs) in the Lupus star-forming region, spanning a range in mass from …

ABSTRACT The Apache Point Observatory Galactic Evolution Experiment (APOGEE) is a
high-resolution infrared spectroscopic survey spanning all Galactic environments (ie, bulge …

We have conducted a high-resolution imaging study of the Taurus–Auriga star-forming
region in order to characterize the primordial outcome of multiple star formation and the …

We have analyzed nearly all images of the Taurus star-forming region at 3.6, 4.5, 5.8, 8.0,
and 24 μm that were obtained during the cryogenic mission of the Spitzer Space Telescope …

The high-precision astrometry from the second data release of the Gaia mission has made it
possible to greatly improve the census of members of nearby clusters and associations. I …