• binarity
• close encounters
• companions
• debris
• flybys
• Gaia
• Herbig
• protoplanetary disks
• transitional

The Gaia EDR3 astrometric data are used to look for flybys and close encounters for a sample of debris disks with statistical validity. To do this, the trajectories of the objects in an area surrounding the disks are reconstructed with time. The analysis is also implemented for a selected sample of protoplanetary and hybrid disks with spirals, asymmetries and other peculiar features. The Gaia data are also used to look for binarity and clustering for a large sample of protoplanetary disks in different evolutionary phases (Herbig stars, transitional and debris disks). The results suggest that binarity is a fundamental aspect in the early stages of the stellar systems, and that a fraction of the companions could be lost with time, possibly due to ejection from the system or collisions during flybys. This is also supported by the extreme high fraction of close flybys experienced by debris disks in the last 5 Myrs. The impact of flybys not only shaped the disks with peculiar features such as spirals, misalignments with the orbit of the planets and asymmetries, but it also altered the original binarity and led to the exchange of debris material between stars.