▪ 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 …

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 …

Cold dark clouds are nearby members of the densest and coldest phase in the Galactic
interstellar medium, and represent the most accessible sites where stars like our Sun are …

The G0 V star HD 166435 has been observed by the fiber-fed spectrograph ELODIE as one
of the targets in the large extra-solar planet survey that we are conducting at the Observatory …

In flux density limited surveys, only sources above a given “cut off” flux density limit, Sc, will
be counted while fainter sources will be discarded. Given a finite beam size, many faint …

Flattened, rotating disks of cool dust and gas extending for tens to hundreds of astronomical
units are found around almost all low-mass stars shortly after their birth. These disks …

All chondrites accreted∼ 3.5 wt.% C in their matrices, the bulk of which was in a
macromolecular solvent and acid insoluble organic material (IOM). Similar material to IOM is …

▪ Abstract Observational studies of low-mass stars during their early stages of evolution, from
protostars through the zero-age main sequence, show highly elevated levels of magnetic …

▪ Abstract Outflow activity is associated with all stages of early stellar evolution, from deeply
embedded protostellar objects to visible young stars. Herbig-Haro (HH) objects are the …