The kinematics and dynamics of stellar and substellar populations within young, still-forming
clusters provide valuable information for constraining theories of formation mechanisms …

The orbits of eight systems with low-mass components (HIP 14524, HIP 16025, HIP 28671,
HIP 46199, HIP 47791, HIP 60444, HIP 61100, and HIP 73085) are presented. Speckle …

ABSTRACT Recent Hubble Space Telescope images have allowed the determination with
unprecedented accuracy of motions and changes of shocks within the inner Orion Nebula …

The foreground Veil of material that lies in front of the Orion Nebula is the best studied
sample of the interstellar medium because we know where it is located, how it is illuminated …

Context. In multiple pre-main-sequence systems the lifetime of circumstellar discs appears to
be shorter than around single stars, and the actual dissipation process may depend on the …

We discuss recent observational data on the transverse and radial velocities, as well as on
the masses of the main components of the Orion Trapezium. Based on the most reliable …

The wavelength displacements of the diffuse interstellar bands (DIBs) at 4502, 5705, 5780,
6284 and 7224 Å, with respect to the well-known, narrow atomic/molecular interstellar lines …

We have selected archival observational data for several O and B trapezia in the Milky Way.
For each of the main components of the trapezia, we obtained transverse velocities from the …

Abstract We have performed Monte Carlo simulations of the trajectories of several runaway
stars using their parallaxes and proper motions from the Gaia EDR3 catalogue. We have …

We use Gaia EDR3 astrometry to propose that a dynamical interaction between the multiple
system θ 1 Ori C and θ 1 Ori F ejected the latter as a walkaway star∼ 1100 yr ago (without …