Table 4: Results for the various evolution scenarios for double white dwarfs with two unstable mass-transfer episodes. The range of observed $\Delta \tau $ is the observed cooling-age difference $\pm~50\%$. Columns labelled 1 through 6 give the number of model solutions for each scenario followed by the range in age difference of these solutions in Megayears. The columns with $\gamma _{\rm a}\gamma _{\rm d}$ and $\gamma _{\rm d}\gamma _{\rm d}$ were left out, because they do not contain any solutions. In addition to a value for $\gamma $ or $\alpha $ in the desired ranges (see Table 3), we demand that $q_{\rm 1i} > 1.03$.
System Obs. $\Delta \tau $ Number of solutions and model age differences (Myr)
  (Myr) 1: $\gamma_{\rm s}\alpha_{\rm ce}$ 2: $\gamma_{\rm s}\gamma_{\rm s}$ 3: $\gamma_{\rm a}\alpha_{\rm ce}$ 4: $\gamma_{\rm a}\gamma_{\rm a}$ 5: $\gamma_{\rm d}\alpha_{\rm ce}$ 6: $\gamma _{\rm d}\gamma _{\rm a}$
0135 175-525 0 5, 636-1138 44, 1454-3598 0 113, 1198-3608 31, 53-1495
0136 225-675 280, 170-775 497, 170-971 201, 1356-7398 116, 1356-4069 1373, 170-5403 1903, 161-3838
0957 163-488 184, 264-1079 5413, 139-5971 0 5, 2946-3659 274, 126-1079 7552, 90-6226
1101 108-323 1412, 868-11331 4919, 1253-11614 9, 9999-12255 0 13, 990-1987 74, 363-2636
1115 80-240 635, 244-1141 3073, 205-1075 29, 648-1129 4, 523-596 83, 240-1344 180, 229-592
 
1204 40-120 0 5, 808-1082 76, 1541-5364 4, 1302-1505 152, 1216-5629 42, 74-1495
1349 ? 161, 215-760 653, 170-840 851, 1690-11521 274, 1356-6374 1892, 215-6505 4283, 157-6168
1414 100-300 0 14, 83-146 0 49, 290-920 0 6, 167-207
1704a -30-10 27, 858-1294 770, 52-2046 0 0 0 0
1704b 10-30 6, 465-553 163, 307-933 0 9, 1060-1313 6, 465-553 311, 205-1498
2209 250-750 6, 552-967 1049, 61-967 0 0 2, 933-975 161, 61-1060


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