Table 3.
HCM-IR abundances compared with optical line-based methods.
| Name | 12 + log(O/H)IR | log(N/O)IR | 12 + log(O/H)HCm | log(N/O)HCm | 12 + log(O/H)lit | Refs. | 12 + log(O/H) |
12 + log(O/H) |
|---|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) |
| Haro 11 | 8.26 ± 0.07 | −1.2 ± 0.1 | 8.23 ± 0.02 | −0.73 ± 0.08 | 8.23 ± 0.03 | 1 | 8.45 | 8.45 |
| IRAS00397-1312 | 8.4 ± 0.2 | – | 8.58 ± 0.03 | −0.65 ± 0.08 | – | – | 8.64 | |
| NGC 253 | 8.5 ± 0.4 | −0.3 ± 0.3 | 8.63 ± 0.07 | −0.5 ± 0.1 | 8.62 ± 0.06 | 2 | 8.77 | 8.76 |
| HS0052+2536 | 8.1 ± 0.2 | – | – | – | 8.1 ± 0.2 | 1 | – | – |
| UM311 | 8.1 ± 0.2 | – | 8.485 ± 0.006 | −1.21 ± 0.03 | 8.37 ± 0.05 | 1 | 8.16 | 8.17 |
| NGC 625 | 8.0 ± 0.2 | – | 8.21 ± 0.01 | −1.26 ± 0.03 | 8.18 ± 0.03 | 1 | 8.11 | 8.11 |
| NGC 891 | 8.85 ± 0.06 | – | 8.68 ± 0.07 | −0.85 ± 0.09 | – | – | 8.48 | |
| NGC 1140 | 8.34 ± 0.04 | – | 8.304 ± 0.006 | −1.19 ± 0.05 | 8.27 ± 0.08 | 1 | 8.24 | 8.27 |
| NGC 1222 | 8.4 ± 0.1 | – | – | – | 8.57 ± 0.09 | 3 | – | – |
| SBS 0335-052 | 7.8 ± 0.2 | – | 7.34 ± 0.02 | −1.34 ± 0.05 | 7.29 ± 0.01 | 1 | 7.27 | 7.30 |
Notes. Columns 1–3 show the name, chemical abundance, and N/O abundance ratio derived from the IR line fluxes using HCM-IR for our sample of star-forming galaxies. These are compared with the abundance determinations derived from the optical line fluxes using HCM in Cols. 4 and 5, and those reported in the literature in columns 6 favouring the direct method (DM) over the strong-line methods (SL) when available (references in Col. 7). Columns 8 and 9 include the abundance estimated obtained using the R and S strong-line calibrations in Pilyugin & Grebel (2016), respectively. The complete version of the table is available at the CDS.
References. (1) Madden et al. (2013; DM); (2) Pilyugin et al. (2014; SL); (3) Petrosian & Burenkov (1993; SL).
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