Table 5.
Median offset and dispersion (scatter) in line ratios at fixed O/H for each diagnostic and calibration considered in this work.
| Calibration | Median offset (dex) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| R3 | R2 | R23 | O32 | O3N2 |  |
N2 | Ne3O2 | O3S2 | |
| Maiolino+08 | −0.13 | 0.055 | −0.084 | −0.24 | −0.21 | – | −0.29 | −0.068 | – |
| Bian+18 | −0.016 | – | 0.034 | 0.12 | 0.41 | – | −0.37 | 0.21 | – |
| Curti+20 | −0.11 | 0.074 | −0.080 | −0.12 | 0.34 | – | −0.34 | 0.041 | −0.039 |
| Nakajima+22 | −0.11 | 0.065 | −0.077 | −0.22 | 0.31 | – | −0.35 | 0.11 | – |
| Laseter+24 | – | – | – | – | – | −0.039 | – | – | – |
| Sanders+24 | −0.015 | −0.010 | 0.011 | 0.034 | – | – | – | 0.12 | – |
| Chakraborty+25 | 0.044 | −0.041 | 0.018 | −0.21 | −0.16 | – | – | 0.092 | – |
| Scholte+25 | – | – | – | – | – | 0.067 | – | – | – |
| This work | 0.0071 | −0.011 | 0.012 | 0.0089 | 0.010 | – | 0.038 | −0.049 | – |
| Scatter (dex) | |||||||||
| Maiolino+08 | 0.13 | 0.85 | 0.12 | 0.36 | 0.38 | – | 0.40 | 0.35 | – |
| Bian+18 | 0.10 | – | 0.31 | 0.42 | 0.76 | – | 0.65 | 0.47 | – |
| Curti+20 | 0.29 | 0.49 | 0.18 | 0.31 | 0.63 | – | 0.64 | 0.28 | 0.52 |
| Nakajima+22 | 0.16 | 0.68 | 0.11 | 0.33 | 0.57 | – | 0.26 | 0.38 | – |
| Laseter+24 | – | – | – | – | – | 0.25 | – | – | – |
| Sanders+24 | 0.070 | 0.25 | 0.11 | 0.30 | – | – | – | 0.32 | – |
| Chakraborty+25 | 0.12 | 0.25 | 0.10 | 0.20 | 0.75 | – | – | 0.32 | – |
| Scholte+25 | – | – | – | – | – | 0.15 | – | – | – |
| This work | 0.10 | 0.26 | 0.077 | 0.32 | 0.28 | – | 0.22 | 0.34 | – |
Notes. Offsets in line ratios are measured as the difference between the observed values and the values predicted by the corresponding strong-line calibration for any given galaxy metallicity in the sample. Both median offsets and dispersions (scatter) are then calculated over the entire metallicity range considered.
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