Table 2.
Abundance ratios of various chemical species of the entire halo.
| Fraction | Mejecta [M⊙] | XH1, p | XHe4, p | XC12, p | XN14, p | XO16, p | XC13, p | XNe22, p | log10(N/O) | log10(C/O) | log10(O/H)+12 | log10(12C/13C) | log10(22Ne/O) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 10% of Mtot | 8900.7 | 0.35 | 0.55 | 0.003 | 0.04 | 0.06 | 0.0004 | 5.7 × 10−5 | −0.17 | −1.30 | 11.23 | 0.875 | −3.02 |
| 40% of Mtot | 32602.8 | 0.22 | 0.63 | 0.009 | 0.065 | 0.08 | 0.0005 | 7.7 × 10−5 | −0.09 | −0.95 | 11.56 | 1.25 | −3.02 |
| Above CO core | 65866.5 | 0.20 | 0.65 | 0.012 | 0.07 | 0.07 | 0.0004 | 8.8 × 10−5 | 0.00 | −0.76 | 11.54 | 1.47 | −3.13 |
Notes. The first column indicates the assumption for the mass lost. The Cols. 3–9 indicate the mean abundance (in mass fraction) of various isotopes in the ejected material by all the stars in the halo simulation of Regan et al. (2020a) with masses above 490 M⊙. The quantities in these columns correspond to Xip defined by Eq. (4). The next five columns show the values of log10(N/O), log10(C/O), log10(O/H)+12, log10(12C/13C) and log10(22Ne/O) respectively, in the material composed from the sum of the ejecta of all the stars. The ratios are in number fractions.
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