▪ Abstract Stellar clusters are born embedded within giant molecular clouds (GMCs) and
during their formation and early evolution are often only visible at infrared wavelengths …

Understanding the formation of stars in galaxies is central to much of modern astrophysics.
However, a quantitative prediction of the star formation rate and the initial distribution of …

Planet-forming disc evolution is not independent of the star formation and feedback process
in giant molecular clouds. In particular, OB stars emit UV radiation that heats and disperses …

Context. The fraction of binary stars is an important ingredient to interpret globular cluster
dynamical evolution and their stellar population. Aims. We investigate the properties of main …

On the Stellar Population and Star-Forming History of the Orion Nebula Cluster ADS Classic is
now deprecated. It will be completely retired in October 2019. This page will automatically …

We use optical and near-infrared star counts to explore the structure and dynamics of the
Orion Nebula Cluster (ONC). This very young (< 1 Myr) cluster is not circularly symmetric in …

Observations suggest that star formation occurs in only one or two crossing times for a range
of scales spanning a factor of∼ 1000. These observations include (1) measurements of …

We present a model for the photoevaporation of circumstellar disks or dense clumps of gas
by an external source of ultraviolet radiation. Our model includes the thermal and dynamic …

Direct N-body calculations are presented of the formation of Galactic clusters using gasex,
which is a variant of the code nbody6. The calculations focus on the possible evolution of the …

We use milli-arcsecond accuracy astrometry (proper motions and parallaxes) from
Hipparcos and from radio observations to retrace the orbits of 56 runaway stars and nine …