Disk Accretion Phase: Sizes
Largest centrifugally supported disks: ~ 300 AU
- Larger, structures found, but no evidence of rotational support
Orion silhouette disks provide direct measurement
- 20 < r < 200 AU (~ 50 disks)
Photo-evaporation and tidal encounters may truncate disks in rich, dense environments
- Correlation between disk size and proximity to q Ori
- Kuiper belt cutoff may reflect photo-evaporation (Hollenbach)