Figure 18: Effects of a finite entropy of donors on the properties of AM CVn-stars. The left
panel shows the relation between and along tracks for a system with initial masses of
components and (like in Figure 9). The solid lines show the evolution for donors
with = 104 K, 106 K, 5 × 106 K, and 107 K (left to right). The symbols show the positions
of models with (triangles), (squares), and (pentagons). The
disk stability criteria (for ) are shown by the dashed lines (after [406]). The right panel
compares the numbers of systems as a function of for the model with a WD
(dot-dashed line) and the model with “realistic” cooling (solid lines, RWDC). The smooth curves
show the percentage of each population laying above a given . (Figures from [77].)
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