Table 1.
Environmental dependence of the stellar-phase mass–metallicity relation.
| Environmental | log(M⋆/M⊙) | EW1501, OV | EW1501, F | EW1719, OV | EW1719, F | Δ(log Z⋆/Z⊙) |
|---|---|---|---|---|---|---|
| diagnostic | range | |||||
| 8.4−9.4 | 0.29 ± 0.16 | 0.55 ± 0.16 | 0.85 ± 0.28 | 1.12 ± 0.37 | −0.3 ± 0.3 | |
| 9.4−9.65 | 0.59 ± 0.15 | 0.50 ± 0.15 | 1.34 ± 0.25 | 1.23 ± 0.3 | 0.1 ± 0.2 | |
| Local density δ | 9.65−9.9 | 0.46 ± 0.13 | 0.64 ± 0.13 | 1.15 ± 0.28 | 1.39 ± 0.24 | −0.2 ± 0.2 |
| 9.9−10.8 | 0.45 ± 0.13 | 0.47 ± 0.10 | 1.7 ± 0.2 | 1.32 ± 0.2 | 0.1 ± 0.2 | |
| 8.4−9.7 | 0.31 ± 0.2 | 0.48 ± 0.07 | 0.78 ± 0.6 | 1.17 ± 0.14 | −0.3 ± 0.4 | |
| Overdensity structure | 9.7−10.8 | 0.42 ± 0.19 | 0.49 ± 0.07 | 0.9 ± 0.4 | 1.64 ± 0.12 | −0.3 ± 0.2 |
| 8.4−9.7 | 0.4 ± 0.3 | 0.50 ± 0.08 | 0.9 ± 0.4 | 1.11 ± 0.16 | −0.15 ± 0.3 | |
| Protocluster (r = 10 cMpc) | 9.7−10.8 | 0.32 ± 0.16 | 0.53 ± 0.07 | 1.3 ± 0.3 | 1.58 ± 0.16 | −0.3 ± 0.2 |
| 8.4−9.6 | 0.29 ± 0.17 | 0.52 ± 0.10 | 0.98 ± 0.37 | 1.2 ± 0.18 | −0.3 ± 0.25 | |
| Protocluster (r = 15 cMpc) | 9.6−9.9 | 0.59 ± 0.18 | 0.61 ± 0.10 | 1.07 ± 0.3 | 1.26 ± 0.19 | −0.1 ± 0.2 |
| 9.9−10.8 | 0.34 ± 0.17 | 0.5 ± 0.10 | 1.36 ± 0.28 | 1.62 ± 0.16 | −0.2 ± 0.2 | |
| 8.4−9.6 | 0.38 ± 0.15 | 0.52 ± 0.1 | 0.97 ± 0.3 | 1.25 ± 0.18 | −0.2 ± 0.25 | |
| Protocluster (r = 20 cMpc) | 9.6−9.9 | 0.33 ± 0.14 | 0.68 ± 0.10 | 1.16 ± 0.3 | 1.30 ± 0.2 | −0.3 ± 0.3 |
| 9.9−10.8 | 0.38 ± 0.15 | 0.53 ± 0.10 | 1.47 ± 0.3 | 1.66 ± 0.18 | −0.2 ± 0.2 | |
Notes. Table indicating, for the stellar MZR and for different stellar mass bins and environmental diagnostics, the equivalent width of the 1501 and 1719 metallicity indices in the spectral stacks corresponding to the overdense regions (EW1501, OV and EW1719, OV) and in the field (EW1501, F and EW1501, F). All EWs are in angstrom and we assume the convention of positive values in absorption. The last column indicates the difference in metallicity Δ(log Z⋆/Z⊙) between galaxies in overdensities (or protoclusters) and in the field in each stellar mass bin.
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