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Table 4
Model definitions.
| Model (a) | Model (b) | |
|
|
||
| Density nH (cm-3) | 2 × 104 | 2 × 105 |
| Temperature (K) | 10 | 10 |
| Cosmic ionization rate per H2 (s-1) | 1.3 × 10-17 | 1.3 × 10-17 |
|
|
||
| He/H | 0.1 | 0.1 |
| C/H | 4.15 × 10-5 | 1.4 × 10-5 |
| N/H | 6.4 × 10-5 | 2.1 × 10-5 |
| O/H | 6 × 10-5 | 2.0 × 10-5 |
| S/H | 8.0 × 10-8 | 8.0 × 10-8 |
| Fe/H | 1.5 × 10-9 | 1.5 × 10-9 |
Notes. TheC/13C and N/15N ratios are respectively taken as 68 (Milam et al. 2005) and 440 (Marty et al. 2011).
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