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 …

▪ 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 …

Turbulence is a crucial factor in many models of planet formation, but it has only been
directly constrained among a small number of planet-forming disks. Building on the upper …

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 …

Turbulence is a fundamental parameter in models of grain growth during the early stages of
planet formation. As such, observational constraints on its magnitude are crucial. Here we …

Planet formation ADS Classic is now deprecated. It will be completely retired in October 2019.
This page will automatically redirect to the new ADS interface at that point. SAO/NASA ADS …

The spatial distribution of gas and solids in protoplanetary disks determines the composition
and formation efficiency of planetary systems. A number of disks show starkly different …

Protoplanetary disks are the sites of planet formation, and the evolution and eventual
dispersal of these disks strongly influences the formation of planetary systems. Disk …

We present an observational and theoretical study of the primary ionizing agents (cosmic
rays (CRs) and X-rays) in the TW Hya protoplanetary disk. We use a set of resolved and …

We present a study of accretion in a sample of 45 young, low-mass objects in a variety of
star-forming regions and young associations, about half of which are likely substellar. Based …