Our Sun and planetary system were born about 4.5 billion years ago. How did this happen,
and what is the nature of our heritage from these early times? This review tries to address …

To understand how planetary systems form in the dusty disks around pre-main-sequence
stars, a detailed knowledge of the structure and evolution of these disks is required …

The formation of gaseous giant planets is thought to occur in the first few million years after
stellar birth. Models predict that the process produces a deep gap in the dust component …

Context. Optical long-baseline interferometry is moving a crucial step forward with the
advent of general-user scientific instruments that equip large aperture and hectometric …

Context. It is now generally accepted that the near-infrared excess of Herbig AeBe stars
originates in the dust of a circumstellar disk. Aims. The aims of this article are to infer the …

We present a spectro-astrometric survey of molecular gas in the inner regions of 16
protoplanetary disks using CRIRES, the high-resolution infrared imaging spectrometer on …

Context. Accretion and outflow processes are of fundamental importance for our
understanding of the formation of stars and planetary systems. To trace these processes …

Protostellar systems, ranging from low-luminosity classical T Tauri and Herbig Ae stars to
high-luminosity Herbig Be stars, exhibit a near-infrared (NIR) excess in their spectra that is …

We present the results of smoothed particle hydrodynamics (SPH) simulations of the disc
around the young, eccentric stellar binary HD 104237. We find that the binary clears out a …

We examine He i λ10830 profile morphologies for a sample of 56 Herbig Ae/Be stars
(HAEBES). We find significant differences between HAEBES and classical T-Tauri stars …