We review progress over the past decade in observations of large-scale star formation, with
a focus on the interface between extragalactic and Galactic studies. Methods of measuring …

The solid content of circumstellar disks is inherited from the interstellar medium: dust
particles of at most a micrometer in size. Protoplanetary disks are the environment where …

We present an analysis of spectroscopic and astrometric data from APOGEE-2 and Gaia
DR2 to identify structures toward the Orion Complex. By applying a hierarchical clustering …

Star formation lies at the center of a web of processes that drive cosmic evolution:
generation of radiant energy, synthesis of elements, formation of planets, and development …

We present a survey of the Orion A and B molecular clouds undertaken with the IRAC and
MIPS instruments on board Spitzer. In total, five distinct fields were mapped, covering 9 deg …

We present a theoretical framework in which bound stellar clusters arise naturally at the high-
density end of the hierarchy of the interstellar medium (ISM). Due to short free-fall times …

ABSTRACT We present the Coordinated Synoptic Investigation of NGC 2264, a continuous
30 day multi-wavelength photometric monitoring campaign on more than 1000 young cluster …

ABSTRACT We used the Atacama Large Millimeter Array (ALMA) to map the emission of the
CO (6–5) molecular line and the 432 μm continuum emission from the 300 pc sized …

This review examines our current understanding of the possible birth environments of our
Solar System. Because most stars form within groups and clusters, the question becomes …

One puzzle in understanding how stars form in clusters is the source of mass—is all of the
mass in place before the first stars are born, or is there an extended period when the cluster …