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Table 1

Ionic and total Fe abundances compared to the predictions of the Fe-ICFs from Rodríguez & Rubin (2005) and Izotov et al. (2006), which are derived from photoionization models.

Ref. Region Fe+/H+ Fe2+/H+ Fe3+/H+ Fe4+/H+ Ionic Sum ICF ICF
R&R05(𝑔) I06(h)
t2 = 0
D83 HS1851+6933(a) 5.200.05+0.06$5.20_{ - 0.05}^{ + 0.06}$ 5.59 ± 0.04 4.490.04+0.05$4.49_{ - 0.04}^{ + 0.05}$ 5.76 ± 0.03 5.88 ± 0.06 6.120.05+0.06$6.12_{ - 0.05}^{ + 0.06}$
D451 W1702+18(a) 4.950.03+0.04$4.95_{ - 0.03}^{ + 0.04}$ 5.280.05+0.06$5.28_{ - 0.05}^{ + 0.06}$ 4.53 ± 0.05 5.50 ± 0.04 5.81 ± 0.03 6.07 ± 0.03
D224 Orion Nebula(b) 4.690.05+0.04$4.69_{ - 0.05}^{ + 0.04}$ 5.55 ± 0.03 5.71 ± 0.07 5.96 ± 0.04 6.11 ± 0.03 6.32 ± 0.03
D235 NGC2579(c) 5.40 ± 0.03 5.240.14+0.16$5.24_{ - 0.14}^{ + 0.16}$ 5.630.07+0.06$5.63_{ - 0.07}^{ + 0.06}$ 5.88 ± 0.03 6.11 ± 0.03
D236 NGC3576(d) 4.59 ± 0.06 5.530.03+0.04${5.53_{ - 0.03}^{ + 0.04}}$ 5.720.08+0.09${5.72_{ - 0.08}^{ + 0.09}}$ 5.95 ± 0.05 5.95 ± 0.03 6.180.03+0.04$6.18_{ - 0.03}^{ + 0.04}$
D283 Mrk71 (e) 4.320.10+0.18${4.32_{ - 0.10}^{ + 0.18}}$ 4.970.07+0.08${4.97_{ - 0.07}^{ + 0.08}}$ 5.06 ± 0.06 5.45 ± 0.14 5.720.10+0.18$5.72_{ - 0.18}^{ + 0.18}$
D403 SMC-N88A(f) 4.990.03+0.04$4.99_{ - 0.03}^{ + 0.04}$ 5.47 ± 0.04 5.59 ± 0.03 6.000.06+0.08$6.00_{ - 0.06}^{ + 0.08}$ 6.270.03+0.04$6.27_{ - 0.03}^{ + 0.04}$
t2 > 0
D83 HS1851+6933(a) 5.200.05+0.07$5.20_{ - 0.05}^{ + 0.07}$ 6.480.09+0.13$6.48_{ - 0.09}^{ + 0.13}$ 5.050.06+0.09$5.05_{ - 0.06}^{ + 0.09}$ 6.520.10+0.11$6.52_{ - 0.10}^{ + 0.11}$ 6.29 ± 0.06 6.580.05+0.06$6.58_{ - 0.05}^{ + 0.06}$
D451 W1702+18(a) 4.94 ± 0.03 5.630.05+0.07$5.63_{ - 0.05}^{ + 0.07}$ 4.740.04+0.05$4.74_{ - 0.04}^{ + 0.05}$ 5.760.04+0.05$5.76_{ - 0.04}^{ + 0.05}$ 5.98 ± 0.03 6.25 ± 0.03
D224 Orion Nebula(b) 4.690.04+0.05$4.69_{ - 0.04}^{ + 0.05}$ 5.55 ± 0.03 5.750.09+0.10$5.75_{ - 0.09}^{ + 0.10}$ 5.99 ± 0.05 6.12 ± 0.03 6.34 ± 0.03
D235 NGC2579(c) 5.40 ± 0.03 5.84 ± 0.14 5.97 ± 0.10 6.10 ± 0.03 6.31 ± 0.03
D236 NGC3576(d) 4.59 ± 0.05 5.530.03+0.04${5.53_{ - 0.03}^{ + 0.04}}$ 6.420.09+0.13${6.42_{ - 0.09}^{ + 0.13}}$ 6.48 ± 0.09 6.19 ± 0.04 6.40 ± 0.03
D283 Mrk71 (e) 4.330.11+0.17${4.33_{ - 0.11}^{ + 0.17}}$ 5.490.17+0.47${5.49_{ - 0.17}^{ + 0.47}}$ 5.510.29+0.31$5.51_{ - 0.29}^{ + 0.31}$ 5.70 ± 0.14 6.030.11+0.19$6.03_{ - 0.11}^{ + 0.19}$
D403 SMC-N88A(f) 4.990.03+0.04${4.99_{ - 0.03}^{ + 0.04}}$ 5.780.06+0.09${5.78_{ - 0.06}^{ + 0.09}}$ 5.840.06+0.07$5.84_{ - 0.06}^{ + 0.07}$ 6.16 ± 0.04 6.440.03+0.04$6.44_{ - 0.03}^{ + 0.04}$

Notes. These values were calculated both considering a homogeneous nebular temperature (t2 = 0) and considering the effect of t2 > 0. The abundance values are presented in units of 12+log(X/H). The reference number is also shown for consistency with the values in Table D2. (a)Izotov et al. (2021); (b)Méndez-Delgado et al. (2021a); (c)Esteban et al. (2013); (d)García-Rojas et al. (2004);(e)Esteban et al. (2009); (f)Domínguez-Guzmán et al. (2022); (𝑔)Rodríguez & Rubin (2005); (h)Izotov et al. (2006).

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