Figure 1.
An example of stellar dust evolution tracks plotted on a color-color diagram. These are preliminary model results for power-law dust density distributions (power given). The solid lines represent amorphous carbon dust while the dashed lines are silicates. Symbols indicate changing optical depth from the Rayleigh-Jeans point (squares=0.001, circles=0.1, crosses=.03). [Ivezic and Elitzur, 95] What is not known is the speed of evolution along these tracks.