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 …

Star clusters stand at the intersection of much of modern astrophysics: the ISM, gravitational
dynamics, stellar evolution, and cosmology. Here, we review observations and theoretical …

We present new models for low-mass stars down to the hydrogen-burning limit that
consistently couple atmosphere and interior structures, thereby superseding the widely used …

Accretion through circumstellar disks plays an important role in star formation and in
establishing the properties of the regions in which planets form and migrate. The …

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 …

Episodic accretion has become a recent focus of attention in the star-and planet-formation
community, turning into a central topic to understand the evolution of protostars and …

Stars form from the gravitational collapse of dense molecular cloud cores. In the protostellar
phase, mass accretes from the core onto a protostar, likely through an accretion disk; and it …

We present the latest development of the disk gravitational instability and fragmentation
model, originally introduced by us to explain episodic accretion bursts in the early stages of …

We have conducted a homogeneous near-infrared (near-IR) spectroscopic survey of 33
objects with varying degrees of similarity to FU Orionis. Common spectroscopic features that …

ABSTRACT HD 139614 is known to be a∼ 14-Myr-old, possibly pre-main-sequence star in
the Sco-Cen OB association in the Upper Centaurus-Lupus subgroup, with a slightly warped …