Evolution of Stellar Disks

Bodenheimer，Peter AST 96-18548 太阳系外行星围绕太阳型恒星的发现，以及观测证据表明许多非常年轻的恒星被原恒星盘所包围，表明盘和行星形成经常发生。 行星系统的特征和年轻恒星的早期演化是由围绕形成恒星的盘的形成、演化和分散决定的。 Bodenheimer博士和Lin博士将研究决定盘演化基本方面的基本物理过程：1）原恒星盘的形成，2）为原行星形成奠定基础的盘演化，以及3）残留盘的耗尽。他们的计算将有助于确定磁盘演化的时间尺度和原行星形成的可能结果。

Bodenheimer, Peter AST 96-18548 The discovery of extrasolar planets around solar-type stars, and the observational evidence that many very young stars are surrounded by proto-stellar disks, indicate that disk and planet formation occur frequently. The characteristics of planetary systems and the early evolution of young stellar objects are determined by the formation, evolution, and the dispersal of the disks that surround forming stars. Drs. Bodenheimer and Lin will investigate the basic physical processes that determine fundamental aspects of disk evolution : 1) the formation of protostellar disks, 2) the disk evolution which sets the stage for protoplanetary formation, and 3) the depletion of the residual disks. Their calculations will help in identifying the disk evolutionary timescales and the likely outcome of protoplanet formation.