The STRADE project tackles a key topic of star formation, namely the evolution of protoplanetary disks around young solar-type stars, from the early proto-stellar phase to the final dispersal stage. However, a unified picture of disk evolution is still missing. The STRADE project aims at investigating, in a wide wavelength range and time domain, populations of YSOs of different ages and enviroments, exploring the physics of the disks, of the outflows / winds and of the star-disk interaction. Time now is ripe for this, as new forefront instruments and spectroscopic surveys are available, while other instruments will be commissioned within coming years.

A multi-wavelength and multi-object spectroscopic approach is adopted in synergy with interferometric observations and recent astrometric surveys. In particular, we will exploit a large spectroscopic data-base of X-Shooter, KMOS, MOONS, GIARPS and LUCI spectra collected by the team, in synergy with ALMA, VLTI/GRAVITY, HST and JWST surveys. The project will take full advantage of the large amount of proprietary data in young associations with ages from 0.1Myr to a few 10Myr, acquired or to be taken soon in GTO and GO programs. This will allow us to draw robust statistical conclusions on the properties of different populations in young clusters and star forming clouds. All the tools and methods have been developed within the JEDI collaboration, guaranteeing a homogeneous analysis. New analysis and models will be extended to other wavelengths and YSOs age domains, as well as the inclusion of interferometric observations.

The STRADE project is a large and coordinated effort. The team gathers highly experienced researchers, in particular in spectroscopic and interferometric observations, and in multi-wavelength data analysis. The project involves 10 staff members of 5 INAF structures and 3 INAF associated researchers from abroad, with a total INAF investment of 8.4 FTEs. The team members have a strong publication record, with more than 320 papers in international refereed journals in the last 5 years. Team members are involved in the MOONS-GTO and VLTI/GRAVITY- GTO, and in the HST ULLYSES/ODYSSEUS DDT public program and the PENELLOPE ESO Large Programe. Some of the participants are in the science working group for the HIRES@E-ELT and CUBES@VLT spectrographs.