Table 6
Comparison of the nebular emission line ratios for a grid of H ii regions where the ionizing source is in each case one of the model stars.
| Model | Z/Z⊙ | [N ii] | [O ii] | [O iii] | [S ii] |
| 6584 + | 3726 + | 5007 + | 6716 + | ||
| 6548 Å | 3729 Å | 4959 Å | 6731 Å | ||
|
|
|||||
| Same metallicity for H ii region and star (dwarfs) | |||||
|
|
|||||
| D-30 | 0.1 | 0.77 | 1.51 | 0.00 | 0.33 |
| 0.4 | 1.43 | 1.63 | 0.00 | 0.73 | |
| 1.0 | 1.48 | 0.94 | 0.00 | 0.85 | |
| 2.0 | 0.86 | 0.29 | 0.00 | 0.56 | |
| D-35 | 0.1 | 0.44 | 1.59 | 1.66 | 0.15 |
| 0.4 | 1.06 | 2.45 | 1.63 | 0.38 | |
| 1.0 | 1.29 | 1.70 | 0.68 | 0.49 | |
| 2.0 | 1.06 | 0.56 | 0.05 | 0.38 | |
| D-40 | 0.1 | 0.09 | 0.45 | 4.62 | 0.09 |
| 0.4 | 0.29 | 0.99 | 5.88 | 0.21 | |
| 1.0 | 0.35 | 0.73 | 2.99 | 0.24 | |
| 2.0 | 0.23 | 0.28 | 0.58 | 0.16 | |
| D-45 | 0.1 | 0.06 | 0.28 | 5.47 | 0.07 |
| 0.4 | 0.16 | 0.58 | 8.34 | 0.18 | |
| 1.0 | 0.20 | 0.48 | 4.52 | 0.21 | |
| 2.0 | 0.12 | 0.20 | 1.00 | 0.13 | |
| D-50 | 0.1 | 0.04 | 0.21 | 5.98 | 0.07 |
| 0.4 | 0.12 | 0.43 | 10.07 | 0.18 | |
| 1.0 | 0.15 | 0.41 | 6.57 | 0.21 | |
| 2.0 | 0.09 | 0.22 | 1.88 | 0.13 | |
| D-55 | 0.1 | 0.03 | 0.14 | 6.60 | 0.06 |
| 0.4 | 0.08 | 0.31 | 12.40 | 0.17 | |
| 1.0 | 0.11 | 0.34 | 10.56 | 0.22 | |
| 2.0 | 0.08 | 0.24 | 3.79 | 0.16 | |
| Same metallicity for H ii region and star (supergiants) | |||||
|
|
|||||
| S-30 | 0.1 | 0.60 | 1.95 | 0.69 | 0.14 |
| 0.4 | 1.33 | 2.33 | 0.46 | 0.37 | |
| 1.0 | 1.30 | 1.25 | 0.09 | 0.41 | |
| 2.0 | 0.64 | 0.25 | 0.01 | 0.25 | |
| S-35 | 0.1 | 0.15 | 0.78 | 3.62 | 0.07 |
| 0.4 | 0.56 | 1.92 | 3.18 | 0.19 | |
| 1.0 | 1.15 | 1.91 | 0.84 | 0.28 | |
| 2.0 | 1.17 | 0.74 | 0.04 | 0.26 | |
| S-40 | 0.1 | 0.07 | 0.35 | 4.99 | 0.06 |
| 0.4 | 0.20 | 0.79 | 6.25 | 0.14 | |
| 1.0 | 0.48 | 1.16 | 2.13 | 0.18 | |
| 2.0 | 0.97 | 0.87 | 0.15 | 0.21 | |
| S-45 | 0.1 | 0.04 | 0.23 | 5.77 | 0.05 |
| 0.4 | 0.12 | 0.49 | 8.41 | 0.13 | |
| 1.0 | 0.17 | 0.46 | 3.91 | 0.15 | |
| 2.0 | 0.27 | 0.24 | 0.66 | 0.09 | |
| S-50 | 0.1 | 0.03 | 0.16 | 6.34 | 0.05 |
| 0.4 | 0.08 | 0.33 | 10.84 | 0.14 | |
| 1.0 | 0.10 | 0.38 | 7.35 | 0.17 | |
| 2.0 | 0.07 | 0.19 | 2.40 | 0.13 | |
| Different metallicity for H ii region (Z = Z⊙) and star | |||||
|
|
|||||
| D-40 | 0.1 | 0.24 | 0.49 | 5.11 | 0.30 |
| 0.4 | 0.29 | 0.57 | 3.42 | 0.25 | |
| 1.0 | 0.35 | 0.73 | 2.99 | 0.24 | |
| 2.0 | 0.43 | 0.93 | 2.42 | 0.25 | |
Notes. We show the ratio of some important nebular line strengths obtained from spherically symmetric nebular models with varying metallicity to the Hβ emission in these model H ii regions.
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