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Table 1

Properties of sdB stars produced from the CE ejection channel in our study.

Mi Mc MsdB MH Y XC XN XO
0.443 0.452 0.453 1.068 × 10-4 0.947 0.020 0.015 7.891 × 10-4
0.444 0.453 0.454 1.593 × 10-4 0.943 0.021 0.014 8.033 × 10-4
0.446 0.455 0.456 0.973 × 10-4 0.948 0.023 0.012 6.717 × 10-4
0.448 0.458 0.458 1.714 × 10-4 0.941 0.025 0.010 7.323 × 10-4
0.45 0.460 0.461 3.724 × 10-4 0.925 0.027 0.008 9.798 × 10-4
0.8 0.452 0.462 0.463 1.100 × 10-4 0.945 0.029 0.007 7.146 × 10-4
0.454 0.464 0.465 0.991 × 10-4 0.943 0.034 0.003 9.053 × 10-4
0.456 0.466 0.467 0.733 × 10-3 0.298 0.003 0.001 9.357 × 10-3
0.458 0.466 0.470 2.589 × 10-3 0.298 0.003 0.001 9.357 × 10-3
0.46 0.466 0.472 4.054 × 10-3 0.298 0.003 0.001 9.357 × 10-3
0.462 0.466 0.473 5.129 × 10-3 0.298 0.003 0.001 9.357 × 10-3
0.464 0.466 0.476 6.855 × 10-3 0.298 0.003 0.001 9.357 × 10-3
0.443 0.449 0.450 1.359 × 10-4 0.944 0.019 0.016 1.133 × 10-3
0.444 0.450 0.451 2.994 × 10-4 0.931 0.021 0.014 1.061 × 10-3
0.446 0.453 0.453 1.113 × 10-4 0.942 0.022 0.013 7.911 × 10-4
0.448 0.455 0.455 1.383 × 10-4 0.939 0.023 0.011 7.524 × 10-4
0.45 0.457 0.457 0.984 × 10-4 0.943 0.026 0.009 7.830 × 10-4
1.0 0.452 0.459 0.459 2.387 × 10-6 0.943 0.028 0.008 7.086 × 10-4
0.454 0.461 0.462 1.316 × 10-4 0.942 0.031 0.005 6.969 × 10-4
0.456 0.463 0.463 3.110 × 10-4 0.759 0.018 0.003 1.049 × 10-2
0.458 0.463 0.466 1.099 × 10-3 0.301 0.003 0.001 9.356 × 10-3
0.46 0.464 0.468 2.061 × 10-3 0.301 0.003 0.001 9.356 × 10-3
0.462 0.464 0.470 2.849 × 10-3 0.301 0.003 0.001 9.356 × 10-3
0.443 0.448 0.449 1.992 × 10-4 0.938 0.019 0.016 1.089 × 10-3
0.444 0.449 0.450 1.663 × 10-4 0.942 0.020 0.014 8.811 × 10-4
0.446 0.451 0.452 2.021 × 10-4 0.938 0.023 0.012 9.771 × 10-4
0.448 0.453 0.454 1.982 × 10-4 0.941 0.024 0.011 8.197 × 10-4
0.45 0.455 0.456 3.228 × 10-4 0.928 0.025 0.010 9.324 × 10-4
1.26 0.452 0.457 0.458 1.782 × 10-4 0.940 0.027 0.009 7.437 × 10-4
0.454 0.459 0.459 1.539 × 10-4 0.941 0.029 0.007 7.031 × 10-4
0.456 0.461 0.461 1.752 × 10-4 0.938 0.033 0.004 1.195 × 10-3
0.458 0.462 0.463 0.732 × 10-3 0.299 0.003 0.002 9.353 × 10-3
0.46 0.462 0.465 1.981 × 10-3 0.299 0.003 0.002 9.353 × 10-3
0.462 0.463 0.467 3.192 × 10-3 0.299 0.003 0.002 9.353 × 10-3
0.445 0.449 0.449 1.406 × 10-4 0.943 0.021 0.014 8.786 × 10-4
0.446 0.450 0.450 1.918 × 10-4 0.939 0.022 0.013 8.543 × 10-4
0.448 0.452 0.452 3.265 × 10-4 0.928 0.023 0.012 9.879 × 10-4
0.45 0.454 0.454 1.877 × 10-4 0.940 0.024 0.011 7.597 × 10-4
1.5 0.452 0.456 0.456 1.949 × 10-4 0.939 0.026 0.009 7.373 × 10-4
0.454 0.457 0.458 1.527 × 10-4 0.941 0.028 0.008 7.539 × 10-4
0.456 0.460 0.460 1.206 × 10-4 0.943 0.031 0.006 7.480 × 10-4
0.458 0.462 0.462 3.002 × 10-4 0.758 0.019 0.003 1.091 × 10-2
0.46 0.462 0.464 1.343 × 10-3 0.294 0.003 0.002 9.350 × 10-3
0.462 0.462 0.466 2.540 × 10-3 0.294 0.003 0.002 9.350 × 10-3

Notes. The first four columns show the initial mass of the donors Mi, the core mass at the onset of the CE process Mc, the core mass just before the first He flash , and the remnant mass after the CE process MsdB, respectively. Columns 5–9 list the total hydrogen mass MH, surface He abundance (Y), surface C abundance (XC), surface N abundance (XN), and surface O abundance (XO), respectively, as He burns stably in the core. The masses are in units of solar mass. Note that the differences between Mc and are caused by the H-shell burning after the CE ejection. The treatment of the CE ejection process may affect the envelope mass after the ejection and the core mass at the first He flash. However, the main results will not change, as discussed in Sect. 4.

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