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Table 1
Chemical compositions (mass fractions) of the zones used in the model.
| Zone | Fe/He | Si/S | O/Si/S | O/Ne/Mg | O/C | He | H | |
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| Mass (M⊙): | 0.092 | 0.14 | 0.16 | 1.9 | 0.58 | 1.3 | 8.0 | |
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| Mass fractions: | ||||||||
| 56Ni | 0.75 | 0.022 | 0 | 0 | 0 | 0 | 0 | |
| 57Co | 0.034 | 9.0 × 10-4 | 1.0 × 10-5 | 0 | 0 | 0 | 0 | |
| 44Ti | 1.5 × 10-3 | 5.2 × 10-5 | 1.6 × 10-5 | 0 | 0 | 0 | 0 | |
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| H | 2.3 × 10-6 | 4.2 × 10-8 | 8.7 × 10-9 | 4.6 × 10-10 | 2.1 × 10-10 | 2.5 × 10-7 | 0.60 | |
| He | 0.14 | 8.3 × 10-6 | 4.3 × 10-6 | 2.0 × 10-6 | 0.078 | 0.99 | 0.40 | |
| C | 3.6 × 10-7 | 1.5 × 10-6 | 8.5 × 10-5 | 0.031 | 0.28 | 3.0 × 10-4 | 2.4 × 10-4** | |
| N | 1.5 × 10-6 | 1.1 × 10-9 | 1.8 × 10-5 | 3.2 × 10-5 | 4.7 × 10-6 | 9.0 × 10-3 | 2.2 × 10-3** | |
| O | 9.7 × 10-6 | 1.6 × 10-5 | 0.46 | 0.70 | 0.62 | 1.6 × 10-4 | 1.8 × 10-3** | |
| Ne | 1.0 × 10-5 | 1.6 × 10-6 | 1.5 × 10-4 | 0.22 | 0.018 | 1.1 × 10-3 | 6.1 × 10-4* | |
| Na | 6.0 × 10-7 | 1.0 × 10-6 | 1.2 × 10-6 | 7.0 × 10-3 | 1.9 × 10-4 | 1.8 × 10-4 | 1.6 × 10-5* | |
| Mg | 1.2 × 10-5 | 1.6 × 10-4 | 7.4 × 10-4 | 0.042 | 4.9 × 10-3 | 5.4 × 10-4* | 5.4 × 10-4* | |
| Al | 2.1 × 10-5 | 2.6 × 10-4 | 1.9 × 10-4 | 4.0 × 10-3 | 3.0 × 10-5* | 3.0 × 10-5* | 3.0 × 10-5* | |
| Si | 1.6 × 10-4 | 0.44 | 0.27 | 3.1 × 10-3 | 2.8 × 10-4* | 2.8 × 10-4* | 2.8 × 10-4* | |
| S | 1.2 × 10-4 | 0.39 | 0.21 | 2.6 × 10-4 | 1.2 × 10-4* | 1.2 × 10-4* | 1.2 × 10-4* | |
| Ar | 1.2 × 10-4 | 0.051 | 0.043 | 8.4 × 10-5 | 5.4 × 10-5* | 5.4 × 10-5* | 5.4 × 10-5* | |
| Ca | 1.3 × 10-3 | 0.031 | 0.012 | 3.1 × 10-5 | 2.3 × 10-5* | 2.3 × 10-5* | 2.3 × 10-5* | |
| Sc | 2.3 × 10-7 | 2.3 × 10-7 | 1.2 × 10-6 | 1.6 × 10-6 | 5.6 × 10-7 | 1.5 × 10-8* | 1.5 × 10-8* | |
| Ti (stable) | 8.6 × 10-4 | 2.9 × 10-4 | 8.4 × 10-5 | 6.2 × 10-6 | 5.3 × 10-6 | 2.3 × 10-6* | 2.3 × 10-6* | |
| V | 2.1 × 10-5 | 1.3 × 10-4 | 3.0 × 10-6 | 6.4 × 10-7 | 4.5 × 10-7* | 4.5 × 10-7* | 4.5 × 10-7* | |
| Cr | 1.3 × 10-3 | 3.2 × 10-3 | 4.1 × 10-5 | 1.3 × 10-5 | 1.2 × 10-5* | 1.2 × 10-5* | 1.2 × 10-5* | |
| Mn | 1.0 × 10-5 | 6.6 × 10-4 | 1.9 × 10-6 | 3.8 × 10-6 | 6.6 × 10-6* | 6.6 × 10-6* | 6.6 × 10-6* | |
| Fe (stable) | 2.3 × 10-3 | 0.050 | 4.3 × 10-4 | 6.9 × 10-4 | 7.2 × 10-4* | 7.2 × 10-4* | 7.2 × 10-4* | |
| Co (stable) | 3.2 × 10-8 | 5.5 × 10-9 | 1.5 × 10-6 | 1.9 × 10-4 | 1.3 × 10-4 | 2.4 × 10-6* | 2.4 × 10-6* | |
| Ni (stable) | 0.037 | 2.4 × 10-3 | 1.2 × 10-3 | 5.6 × 10-4 | 2.3 × 10-4 | 4.8 × 10-5* | 4.8 × 10-5* | |
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| Mean atomic weight | 19.4 | 31.6 | 21.5 | 16.9 | 12.1 | 4.0 | 1.5 | |
Notes. Primordial LMC abundances are marked with an asterisk, and CNO abundances derived from observations of the inner circumstellar ring are marked with two asterisks. See also Sect. 2.1.
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