Initial Conditions: The Transition from Cores to Disks
First Author:
Neal Evans
Email: nje AT astro.as.utexas.edu
UT Austin - Astronomy Dept
1 University Station C1400
Austin, TX 78712 USA
Abstract
The evolution of protostars from infalling envelopes to revealed disks sets the initial conditions for later evolution of the star-disk system. Spitzer was able to detect mid-infrared emission from most Class 0 objects, providing direct evidence for disks and constraining their properties during the early infall phase. Studies of large samples with Spitzer have clarified the timescales for envelope dissipation and provided strong evidence for large variations in accretion rate, with likely consequences for initial disk properties and materials. These may have substantial consequences for later evolution.
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