Long-baseline interferometry offers the possibility to achieve the angular resolution required to resolve the
protoplanetary disks of young stellar objects (YSOs). T Tauri stars are a class of YSOs with low stellar mass and
passively evolving disks.
In this talk I present my work on an atlas of disks around ~50 T Tauri stars, observed with the MIDI instrument,
the mid-infrared interferometer on the VLTI.
The size of the sample enables us to do a statistical analysis on the disk sizes and study different evolutionary
scenarios among the low-mass YSO population.
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