Table 5
Ionic abundances (in units of 12 + log(Xi/H+)) obtained using the different recipes described in the text.
| Recipe | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | ||
| Use ω | No | No | No | Yes | Yes | Yes | Yes | |
| Te (RLs) (a) | [N II]/[S III] | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | |
| Te (H I in RLs)(b) | Ion | Ion | PJ | Ion | Ion | Ion | Ion | |
| Te (CELs) (a) | [N II]/[S III] | [N II]/[S III] | [N II]/[S III] | [N II]/[S III] | [N II]/[S III] | [N II]/[S III] | [N II]/[S III] | |
| Te (H I in CELs)(b) | Ion | Ion | PJ | Ion | Ion | Ion | 8300 | |
| Te (CELs IP > 35 eV) | [S III] | [S III] | [S III] | [S III] | [Ar III] | <[Ar III], [Ar IV]> | <[Ar III], [Ar IV]> | |
| Ab. ratio | Line | 12+log(Xi+/H+) from CELs | ||||||
| N0/H+ | [N I] 5198 | 5.79±0.12 | 5.79 ± 0.12 | 5.92 ± 0.12 | 5.84 ± 0.12 | 5.84 ± 0.12 | 5.84 ± 0.12 | 5.86 ± 0.10 |
| N+/H+ | [N II] 6548 | 7.13 ± 0.07 | 7.13 ± 0.07 | 7.26 ± 0.09 | 7.18 ± 0.07 | 7.18 ± 0.07 | 7.18 ± 0.07 | 7.20 ± 0.05 |
| O0/H+ | [O I] 6300 | 6.42 ± 0.08 | 6.42 ± 0.08 | 6.55 ± 0.09 | 6.47 ± 0.08 | 6.47 ± 0.08 | 6.47 ± 0.08 | 6.49 ± 0.06 |
| O+/H+ | [O II] 7330+ | 7.54 ± 0.13 | 7.54 ± 0.13 | 7.67 ± 0.14 | 7.59 ± 0.13 | 7.59 ± 0.13 | 7.59 ± 0.13 | 7.61 ± 0.12 |
| O2+/H+ | [O III] 4959 | 8.83 ± 0.05 | 8.83 ± 0.05 | 8.93 ± 0.08 | 8.88 ± 0.05 | 8.77 ± 0.04 | 8.59 ± 0.04 | 8.65 ± 0.04 |
| S+/H+ | [S II] 6731 | 5.71 ± 0.09 | 5.71 ± 0.09 | 5.84 ± 0.10 | 5.76 ± 0.09 | 5.76 ± 0.09 | 5.76 ± 0.09 | 5.78 ± 0.08 |
| S2+/H+ | [S III] 9069 | 6.91 ± 0.05 | 6.91 ± 0.05 | 7.01 ± 0.08 | 6.96 ± 0.05 | 6.96 ± 0.05 | 6.96 ± 0.05 | 6.95 ± 0.04 |
| Cl2+/H+ | [Cl III] 5538 | 5.23 ± 0.05 | 5.23 ± 0.05 | 5.32 ± 0.08 | 5.28 ± 0.05 | 5.28 ± 0.05 | 5.28 ± 0.05 | 5.27 ± 0.04 |
| Cl3+/H+ | [Cl IV] 8046 | 4.85 ± 0.04 | 4.85 ± 0.04 | 4.94 ± 0.08 | 4.90 ± 0.04 | 4.82 ± 0.04 | 4.71 ± 0.03 | 4.76 ± 0.03 |
| Ar2+/H+ | [Ar III] 7136 | 6.49 ± 0.04 | 6.49 ± 0.04 | 6.58 ± 0.08 | 6.54 ± 0.04 | 6.54 ± 0.04 | 6.54 ± 0.04 | 6.53 ± 0.04 |
| Ar3+/H+ | [Ar IV] 4740 | 6.21 ± 0.05 | 6.21 ± 0.05 | 6.31 ± 0.08 | 6.26 ± 0.05 | 6.14 ± 0.04 | 5.97 ± 0.05 | 6.02 ± 0.05 |
| Ar4+/H+ | [Ar V] 7005 | 3.89 ± 0.05 | 3.89 ± 0.05 | 3.98 ± 0.08 | 3.94 ± 0.05 | 3.85 ± 0.04 | 3.72 ± 0.03 | 3.77 ± 0.03 |
| Kr3+/H+ | [Kr IV] 5868 | 3.69 ± 0.05 | 3.69 ± 0.05 | 3.79 ± 0.08 | 3.74 ± 0.05 | 3.65 ± 0.04 | 3.50 ± 0.04 | 3.56 ± 0.03 |
| Ab. ratio | Line | 12+log(Xi+/H+) from RLs | ||||||
| He+/H+ | He I 5876 | 11.08 ± 0.03 | 11.08 ± 0.03 | 11.02 ± 0.09 | 10.95 (w), 11.48 (c)(c) | |||
| He2+/H+ | He II 4686 | 10.03 ± 0.03 | 10.03 ± 0.03 | 10.13 ± 0.08 | <10.08 (w), <10.86 (c)(c) | |||
| C2+/H+ | C II 6462 | 9.31 ± 0.02 | 9.16 ± 0.02 | 8.79 ± 0.07 | 10.13 ± 0.02 | 10.13 ± 0.02 | 10.13 ± 0.02 | 10.13 ± 0.02 |
| N2+/H+ | N II 5679 | 9.13 ± 0.02 | 9.07 ± 0.02 | 8.70 ± 0.07 | 10.04 ± 0.02 | 10.04 ± 0.02 | 10.04 ± 0.02 | 10.04 ± 0.02 |
| O+/H+ | O I 7773+ | 8.82 ± 0.04 | 8.78 ± 0.04 | 8.41 ± 0.08 | 9.75 ± 0.04 | 9.75 ± 0.04 | 9.75 ± 0.04 | 9.75 ± 0.04 |
| O2+/H+ | O II 4649+ | 9.65 ± 0.03 | 9.59 ± 0.03 | 9.21 ± 0.08 | 10.56 ± 0.03 | 10.56 ± 0.03 | 10.56 ± 0.03 | 10.56 ± 0.03 |
| O2+/H+ | O II 4661 | 9.52 ± 0.03 | 9.57 ± 0.03 | 9.19 ± 0.08 | 10.53 ± 0.03 | 10.53 ± 0.03 | 10.53 ± 0.03 | 10.53 ± 0.03 |
Notes. The first 6 rows summarise the temperatures used in each recipe. The following rows give the ionic abundance obtained from the emission line given in the corresponding first column. (a)Te([N II]) for ions with IP < 17 eV / Te([S III]) for ions with IP > 17 eV. (b)“Ion” meaning that for computing the emissivity of H I we adopt the same physical conditions than for the corresponding ion; “PJ” is the Te computed from the Paschen jump. (c)For the warm (w) and cold (c) regions. See Sec. 5.3.
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