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Table 12
Ionic concentrations and chemical abundances in He2-108.
| Ion | λ | Int./Hβ | Nion/Np | ICF | Nel./Np |
|
|
|||||
| He+ | 5875 | 17 | 0.11 | 0.11 | |
| C++ | 1909 | ≤18 | ≤1.7(–4) | 1.1 | ≤1.9(–4) |
| N + | 6584 | 105 | 3.2(–5) | 1.9 | 6.0(–5) |
| O+ | 3727 | 67 | 1.4(–4) | ||
| O++ | 5007 | 200 | 1.35(–5) | 1 | 2.8(–4) |
| Ne+ | 12.8 | 102 | 1.72(–4) | ||
| Ne++ | 15.5 | 16.5 | 1.14(–5) | 1 | 2.9(–4) |
| S+ | 6731 | 2 | 1.4(–7) | ||
| S++ | 18.7 | 72.2 | 7.46(–6) | ||
| S+3 | 10.5 | 3.6 | 4.4(–7) | 1 | 8.1(–6) |
| Ar++ | 8.99 | 25 | 2.7(–6) | 1.9 | 5.1(–6) |
| Fe++ | 22.9 | 1.02 | 3.6(–7) | 1.2 | 4.0(–7) |
Notes. Wavelength in Angstrom for all values of λ above 1000, otherwise in μm. Intensities given with respect to Hβ = 100.
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