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The evolution and appearance of circumstellar disks in star forming regions can be influenced strongly by the radiation from nearby hot stars. Here we describe the results of numerical simulations of the evolution of protostellar disks and their immediate surroundings under the influence of external UV radiation.
The evolution and appearance of circumstellar disks in star forming regions are influenced strongly by the radiation from either the central star itself or close comparison and nearby hot stars.
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The evolution and appearance of protostellar disks can be significantly altered by their UV environment. We follow the evolution after the external UV radiation source has been turned on.
We present results of numerical simulations carried out with a 2D radiation hydrodynamics code in order to study the impact of massive stars on their surrounding interstellar medium. This first paper deals with the evolution of the circumstellar gas around an isolated 60 M star.
We review the evidence pertaining to the lifetimes of planet-forming disks and discuss possible disk dispersal mechanisms: 1) viscous accretion of material onto the central source, 2) close stellar encounters, 3) stellar winds, and 4) photoevaporation by ultraviolet radiation.
Young stellar objects are born in molecular cluds in the Milk Way and external galaxies.