Description
planet formation and evolution is tightly connected to the physics of young protoplanetary disks, which is an inherently complex problem that requires a multi-wavelength, multi-scale observational approach. In this context, our understanding of the properties of the inner (~0.1-1AU) regions of the disk appears to be highly relevant for the comprehension of the global picture, setting the need for high-angular resolution data. GRAVITY at the VLTI is one of the instruments capable of uniquely addressing these questions in the near-IR range thanks to the milliarcsecond resolution reachable. In the context of the GRAVITY YSO survey, the study of an homogeneous population of Herbig and T Tauri stars provides details on the spatial structuration of the dust associated with the continuum emission. The spectral capabilities of Gravity allows us to derive constraints on the Brackett-gamma line emitting regions in the context of scenarii dominated by magnetospheric accretion or gas in keplerian rotation, as well as on the regions of hot CO emission in more massive YSOs. These results constitute the seed for larger studies that will become possible with the GRAVITY+ upgrade, which anticipated capabilities for the study of YSOs will be briefly presented as well.
