Protostellar Disk Formation and Early Evolution |
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Authors: | Fred C Adams Gregory Laughlin |
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Institution: | (1) Department of Physics, University of Michigan, Ann Arbor, MI, 48109;(2) NASA Ames Research Center, Moffett Field, CA, 94720 |
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Abstract: | This contribution describes the formation of circumstellar disks and their earliest evolutionary phases when self-gravity
in the disk plays a crucial role in eliciting the transport of mass and angular momentum. We first discuss the formation of
protostellar disks within the context of analytic infall-collapse solutions. We then discuss our efforts to understand the
behavior of the newly formed disks. Our specific approach consists of performing a detailed analysis of a simplified model
disk which is susceptible to the growth of a spiral instability. Using a combination of numerical simulation and semi-analytic
analysis, we show how the dramatic early phase of mass and angular momentum transport in the disk can be explained by a second-order
nonlinear process involving self-interaction of a dominant two-armed spiral mode.
This revised version was published online in June 2006 with corrections to the Cover Date. |
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Keywords: | Self Gravitating Disks Spiral Modes Nonlinear Interactions |
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