Open Access
Table 1.
Definitions of line ratios adopted throughout the paper.
| Diagnostics | Line ratio |
|---|---|
| R3 | log10([O III]λ5007 / Hβ) |
| N2 | log10([N II]λ6583 / Hα) |
| S2 | log10([S II]λλ6716,31 / Hα) |
| O1 | log10([O I]λλ6300 / Hα) |
| He2 | log10(He IIλ4686 / Hβ) |
| O3Hg | log10([O III]λ4363 / Hγ) |
| O32 | log10([O III]λ5007 / [O II]λλ3726,29) |
| Ne3O2 | log10([Ne III] λ3869 / [O II] λλ3726,29) |
| C43 | log10(C IVλλ1549,51/CIII]λλ1907,09) |
| C3He2 | log10(C III] λλ1907,09 / He IIλ1640) |
| Ne43 | log10([Ne IV] λλ2422,24/[Ne III] λ3869) |
| N5C3 | log10(N V λλ1239,42/CIII]λλ1907,09) |
| N4C3 | log10(N IV] λλ1483,86/CIII]λλ1907,09) |
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