Since Protostars and Planets VI (PPVI), our knowledge of the global properties of
protoplanetary and debris disks, as well as of young stars, has dramatically improved. At the …

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 …

Discs of gas and dust around million-year-old stars are a by-product of the star formation
process and provide the raw material to form planets. Hence, their evolution and dispersal …

The role of turbulence and magnetic fields is studied for star formation in molecular clouds.
We derive and compare six theoretical models for the star formation rate (SFR)—the …

We review current understanding of star formation, outlining an overall theoretical framework
and the observations that motivate it. A conception of star formation has emerged in which …

Although fundamental for astrophysics, the processes that produce massive stars are not
well understood. Large distances, high extinction, and short timescales of critical …

Star-forming gas clouds are strongly magnetized, and their ionization fractions are high
enough to place them close to the regime of ideal magnetohydrodyamics on all but the …

We present a survey of optical [O i] emission at 6300 Å toward 65 T Tauri stars at the spectral
resolution of∼ 7 km s− 1. Past work identified a highly blueshifted velocity component (HVC) …

Young stars are associated with prominent outflows of molecular gas,. The ejection of gas is
believed to remove angular momentum from the protostellar system, permitting young stars …

We report results from global ideal MHD simulations that study thin accretion disks (with
thermal scale height H/R= 0.1 and 0.05) threaded by net vertical magnetic fields. Our …