Linked from
The 8 pages that link to Photoevaporation, each with the reason it gives.
Protoplanetary diskRelated: Radiation from the star and its surroundings helps disperse disk gas.
Eagle NebulaRelated: Ultraviolet radiation erodes exposed gas at the pillars’ surfaces.
Bok globuleRelated: Ultraviolet light can remove a globule's outer gas before collapse is complete.
ProplydRelated: Ultraviolet heating drives gas off the disk and forms its outward-flowing envelope.