Table 2.
Mean and standard deviation of 12 + log(O/H) for all and Σ(Hα) < 39 (DIG-dominated) data points. Values were derived using the direct method (DM) Te([SIII]) and the N2 and O3N2 calibrators from Denicoló et al. (2002) (D), Pettini & Pagel (2004) (PP), and Marino et al. (2013) (M).
| 12 + log(O/H) | ||
|---|---|---|
| Method | UM 462 | IIZw 40 |
| All data points | ||
| DM Te([SIII]) | 8.01 ± 0.22 | 8.00 ± 0.33 |
| N2 D | 8.12 ± 0.25 | 8.14 ± 0.20 |
| O3N2 PP | 8.20 ± 0.17 | 8.20 ± 0.15 |
| N2 PP | 8.12 ± 0.19 | 8.14 ± 0.15 |
| O3N2 M | 8.18 ± 0.11 | 8.18 ± 0.10 |
| N2 M | 8.11 ± 0.16 | 8.13 ± 0.13 |
| Data points with log Σ(Hα) < 39 (DIG) | ||
| DM Te([SIII]) | … | … |
| N2 D | 8.24 ± 0.33 | 8.34 ± 0.29 |
| O3N2 PP | 8.31 ± 0.19 | 8.31 ± 0.21 |
| N2 PP | 8.21 ± 0.26 | 8.29 ± 0.23 |
| O3N2 M | 8.25 ± 0.13 | 8.25 ± 0.14 |
| N2 M | 8.18 ± 0.21 | 8.25 ± 0.19 |
Notes. Values are given as mean ± standard deviation.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.