Destruction of Stellar Disks by Photoevaporation
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Photoevaporation 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'
4 pages, 5 figures; invited paper to appear in proceedings of 'Bodenheimer Fest'