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Table 9
Comparative Cloudy photoionization modelling of F56#2.
| Species | λ (Å) | Flux & | Model | Model | Model | Model | Model | Model | Model | Model |
| error | O + 0.2 | O – 0.2 | TBB + 20 kK | TBB – 20 kK | Ne × 2.0 | Ne × 0.5 | Mod. atmos. | |||
|
|
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| [O II] | 3727 | 56 ± 13 | 59 | 58 | 47 | 53 | 59 | 32 | 53 | 57 |
| [Ne III] | 3868 | 124 ± 13 | 124 | 127 | 128 | 122 | 123 | 126 | 125 | 125 |
| [O III] | 4363 | 28 ± 8 | 24 | 15 | 27 | 26 | 22 | 22 | 22 | 27 |
| He I | 4471 | 6 ± 3 | 6 | 6 | 6 | 3 | 11 | 6 | 9 | 6 |
| He II | 4686 | 39 ± 8 | 39 | 38 | 34 | 46 | 30 | 37 | 30 | 38 |
| Hβ | 4861 | 100 ± 0 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| [O III] | 4959 | 457 ± 31 | 449 | 448 | 398 | 451 | 471 | 454 | 458 | 456 |
| [O III] | 5007 | 1367 ± 90 | 1350 | 1348 | 1199 | 1358 | 1417 | 1367 | 1377 | 1371 |
| He I | 5876 | 6 ± 3 | 18 | 18 | 19 | 11 | 33 | 19 | 28 | 20 |
| Hα | 6562 | 281 ± 19 | 286 | 285 | 290 | 286 | 286 | 284 | 285 | 288 |
| [N II] | 6583 | 55 ± 5 | 54 | 57 | 58 | 53 | 53 | 54 | 53 | 57 |
| He I | 6678 | 7 ± 4 | 4 | 5 | 4 | 2 | 8 | 4 | 7 | 5 |
| [Ar III] | 7133 | 8 ± 3 | 9 | 6 | 10 | 8 | 9 | 7 | 9 | 8 |
| [O II] | 7325 | 14 ± 4 | 16 | 14 | 13 | 19 | 14 | 15 | 9 | 16 |
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| Model input | ||||||||||
|
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| TBB(kK) | 155 | 152.5 | 150 | 175 | 135 | 150 | 132.5 | 1701 | ||
| NH (cm-3) | 10 000 | 10 000 | 10 000 | 12 000 | 8000 | 20 000 | 5000 | 10 000 | ||
| 12 + log(He) | 11.15 | 11.15 | 11.20 | 11.00 | 11.35 | 11.15 | 11.30 | 11.18 | ||
| 12 + log(C) | 8.40 | 9.20 | 6.60 | 8.40 | 8.40 | 8.70 | 8.40 | 8.20 | ||
| 12 + log(N) | 7.85 | 8.02 | 7.84 | 7.85 | 7.88 | 8.01 | 8.05 | 7.85 | ||
| 12 + log(O) | 8.43 | 8.63 | 8.23 | 8.48 | 8.43 | 8.49 | 8.40 | 8.39 | ||
| 12 + log(Ne) | 7.72 | 7.96 | 7.57 | 7.75 | 7.70 | 7.78 | 7.70 | 7.67 | ||
| 12 + log(Ar) | 6.00 | 6.00 | 6.15 | 6.00 | 6.00 | 6.00 | 6.00 | 5.95 | ||
|
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| FoM | 7.53 | 8.30 | 13.46 | 7.34 | 14.79 | 9.06 | 12.90 | 8.56 | ||
Notes.
(1)
Model atmosphere: PG1159 atmosphere with T ∗ = 170 000 K and log g = 7.00 from Rauch (2003). S abundance fixed at 12 + log(S/H) = 6.55.
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