2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/7446Photoevaporation may provide an explanation for the short lifetimes of disks around young stars. With the exception of neutral oxygen lines, the observed low-velocity forbidden line emission from T Tauri stars can be reproduced by photoevaporating models. The natural formation of a gap in the disk at several AU due to photoevaporation and viscous spreading provides a possible halting mechanism for migrating planets and an explanation for the abundance of observed planets at these radii.4 pages, 5 figures; invited paper to appear in proceedings of 'Bodenheimer Fest'Astrophysicstext