Table 2
NJ/NC ratios for single (Col I) and binary (Col II) stars.
| Z | NJ/NC(%) from single (HBB) stars (I) | NJ/NC(%) from binaries (II) | NJ/NC(%) (III) | ||
|
|
|||||
| Post-nova mergers (II a) | HBB (II b) | Model (III a) | Obs. (III b) | ||
| 0.008 | 0.71 | 3.0 | 0.27 | 1.95 | 10 |
| 1.07∗ | 4.75∗ | 4.45 | |||
| 0.02 | 0.00 | 0.3 | 0.06 | 0.36 | 15 |
| 0.01∗ | 3.43∗ | 3.44 | |||
Notes. The ratios in IIa and IIb marked by ∗ are calculated by including GB-MS (Case-B RLOF) mergers which have a longer HBB-phase compared to single AGB stars of similar total mass, and hence increase the NC and NJ for binaries from HBB stars. The model (III a) NJ/NC is calculated by adding the contributions to NJandNC from both single (I) and binary stars (II a & b), assuming a constant binary fraction of 0.5. Observed statistics (III b) are from Morgan et al. (2003) and Abia & Isern (2000) for the LMC and our Galaxy respectively.
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