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Table 3
Overview of the used model atoms.
| Ion | Levels | Lines |
|
|
||
| H i | 22 | 595 |
| H ii | 1 | 325 |
| He i | 35 | 0 |
| He ii | 26 | 231 |
| He iii | 1 | 0 |
| C i | 2 | 0 |
| C ii | 32 | 703 |
| C iii | 40 | 630 |
| C iv | 21 | 703 |
| C v | 1 | 1 |
| N i | 1 | 1 |
| N ii | 38 | 496 |
| N iii | 36 | 780 |
| N iv | 38 | 210 |
| N v | 2 | 0 |
| O i | 2 | 1 |
| O ii | 36 | 630 |
| O iii | 33 | 528 |
| O iv | 25 | 300 |
| O v | 2 | 1 |
| Fe ia | 1 | 0 |
| Fe iia | 2 | 1 |
| Fe iiia | 8 | 25 |
| Fe iva | 11 | 49 |
| Fe va | 13 | 69 |
| Fe via | 17 | 121 |
| Fe viia | 11 | 52 |
| Fe viiia | 1 | 0 |
Notes.
(a)
A super-level approach is used for this element. Fe actually denotes a generic atom that also includes the additional iron group elements Sc, Ti, V, Cr, Mn, Co, and Ni. The details and relative abundances are given in Gräfener et al. (2002).
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