Protoplanetary disks in young clusters are exposed to radiation from the surrounding stars. Such radiation fields may substantially truncate the disk and shorten the disk lifetime. With Fred Adams and Nuria Calvet, we consider the effects of external FUV radiation on protoplanetary disk evolution, using viscous disk models coupled with photoevaporation.

We explore the effects of different external FUV fluxes, as well as different alpha-viscosities, and identify the situations that may lead to efficient disk depletion. We also apply this model to observed proplyds in the Orion Nebula Cluster. See Anderson, Adams, & Calvet 2013 for more details.