Table 1.
Baseline LMC metal abundances (X/H by number) with respect to Z⊙ from Magg et al. (2022, MBS22).
| Element | SNR | H II regions |
B stars |
F supergiants |
⟨LMC⟩ | Solar | ⟨LMC⟩ | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| D19 | G99 | P03/SCT17 | T03 | L08 | K00/K05 | T07/H07 | D18 | HAS95 | A01 | X/H | MBS22 | logX/H + 12 | Z⊙ | |
| C | 1.2×10−4 | 7.9×10−5 | 1.0×10−4 | ⋯ | ⋯ | 9.5×10−5 | ⋯ | ⋯ | 1.2×10−4 | 8.9×10−5 | 1.0×10−4 | 3.6×10−4 | 8.01 | 0.28 |
| N | (1.6×10−5) | 7.9×10−6 | 1.6×10−5 | ⋯ | ⋯ | 1.0×10−5 | 7.9×10−6 | ⋯ | ⋯ | ⋯ | 1.1×10−5 | 9.5×10−5 | 7.03 | 0.12 |
| O | 2.2×10−4 | 2.5×10−5 | 3.2×10−4 | 2.2×10−4 | ⋯ | 2.5×10−4 | 2.3×10−4 | ⋯ | (2.8×10−4) | (3.2×10−4) | 2.5×10−4 | 5.9×10−4 | 8.40 | 0.42 |
| Ne | 4.0×10−5 | 4.0×10−5 | 6.8×10−5 | 4.6×10−5 | 5.8×10−5 | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | 5.0×10−5 | 1.4×10−4 | 7.70 | 0.35 |
| Na | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | 1.5×10−6 | 7.9×10−7 | 1.2×10−6 | 1.9×10−6 | 6.1 | 0.6 |
| Mg | 1.5×10−5 | ⋯ | ⋯ | ⋯ | ⋯ | 1.4×10−5 | 1.2×10−5 | 1.0×10−5 | 1.6×10−5 | ⋯ | 1.3×10−5 | 3.5×10−5 | 7.13 | 0.46 |
| Al | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | 7.2×10−7 | ⋯ | ⋯ | 2.2×10−6 | ⋯ | 1.5×10−6 | 2.7×10−6 | 6.2 | 0.5 |
| Si | 1.3×10−5 | 5.0×10−6 | ⋯ | ⋯ | ⋯ | 1.2×10−5 | 1.6×10−5 | ⋯ | (3.7×10−5) | ⋯ | 1.1×10−5 | 3.9×10−5 | 7.06 | 0.32 |
| S | 9.5×10−6 | 5.0×10−6 | 9.8×10−6 | 5.9×10−6 | 5.9×10−6 | ⋯ | ⋯ | ⋯ | 9.9 × 10−6 | ⋯ | 7.7×10−6 | 1.4×10−5 | 6.88 | 0.53 |
| Cl | 9.1×10−8 | ⋯ | 6.6×10−8 | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | 7.9×10−8 | 1.8×10−7 | 4.9 | 0.4 |
| Ar | 6.2×10−7 | 1.6×10−6 | 1.8×10−6 | 1.4×10−6 | 2.1×10−6 | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | 1.5×10−6 | 3.2×10−6 | 6.2 | 0.5 |
| Ca | 1.0×10−6 | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | 1.6×10−6 | ⋯ | 1.3×10−6 | 2.3×10−6 | 6.1 | 0.6 |
| Cr | 2.2×10−7 | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | 2.6×10−7 | ⋯ | 2.4×10−7 | 5.5×10−7 | 5.4 | 0.4 |
| Fe | 2.1×10−5 | ⋯ | (2.5×10−6) | ⋯ | (1.7×10−6) | 1.2×10−5 | 1.7×10−5 | ⋯ | 1.7×10−5 | ⋯ | 1.7×10−5 | 3.2×10−5 | 7.23 | 0.54 |
| Ni | 7.9×10−7 | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | ⋯ | 9.2×10−7 | ⋯ | 8.6×10−7 | 1.7×10−6 | 5.9 | 0.5 |
Notes. Values shown in parentheses are excluded from the average, due to issues with enhancements owing to mixing (e.g. N), depletion on dust grains (Fe) or other concerns. log(P/H)+12 = 5.1 or 0.5 Z⊙ is adopted for P following ISM studies of Tchernyshyov et al. (2015).
References. HAS95: Hill et al. (1995); G99: Garnett (1999); K00: Korn et al. (2000; He/Al/Fe only); K05: Korn et al. (2005; excl He/Al/Fe); A01: Andrievsky et al. (2001); P03: Peimbert et al. (2019; excl. C/O); T03: Tsamis et al. (2003); T07: Trundle et al. (2007); H07: Hunter et al. (2007); L08: Lebouteiller et al. (2008); SCT17: Toribio San Cipriano et al. (2017; C/O recomb lines for 30 Dor); D18: Dufton et al. (2018); D19: Dopita et al. (2019).
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