An observational review is provided of the properties of accretion disks around young stars.
It concerns the primordial disks of intermediate-and high-mass young stellar objects in …

The role of outflows in the formation of stars and the protostellar disks that generate them is
a central question in astrophysics. Outflows are associated with star formation across the …

The central problem in forming a star is the angular momentum in the circumstellar disk,
which prevents material from falling into the central stellar core. An attractive solution to the …

Context. Massive stars form in magnetized and turbulent environments and are often located
in stellar clusters. The accretion and outflows mechanisms associated with forming massive …

We wish to constrain the possible contribution of a magnetohydrodynamic disk wind (DW) to
the HH212 molecular jet. We mapped the flow base with ALMA Cycle 4 at 0. ̋13~ 60 au …

The formation of astrophysical objects of different nature, from black holes to gaseous giant
planets, involves a disk–jet system, where the disk drives the mass accretion onto a central …

Recent observations have suggested that circumstellar disks may commonly form around
young stellar objects. Although the formation of circumstellar disks can be a natural result of …

Most massive stars form in dense clusters where gravitational interactions with other stars
may be common. The two nearest forming massive stars, the BN object and Source I …

One of the outstanding problems in star formation theory concerns the transfer of angular
momentum so that mass can accrete onto a newly born young stellar object (YSO). From a …

We report ALMA long-baseline observations of Orion Source I (SrcI), with a resolution 0 farcs
03–0 farcs 06 (12–24 au) at 1.3 and 3.2 mm. We detect both continuum and spectral line …