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Table 3.
Reduced chi-square and abundance ratios obtained by fitting line strengths for the “inner” (R = 0″) and “outer” (R = 60″) reference radial bins of the M31 bulge, for different models and sets of indices (see the text).
| Inner | Outer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Fitting |  |
[C/Fe] | [Mg/Fe] | [O/Fe] |  |
[C/Fe] | [Mg/Fe] | [O/Fe] | ||
| Optical | 0.30 | 0.04 ± 0.02 | 0.14 ± 0.02 | 0.02 ± 0.08 | 0.30 | 0.15 ± 0.02 | 0.16 ± 0.02 | 0.27 ± 0.06 | ||
| EMILES iT | 1.07 | 0.03 ± 0.01 | 0.15 ± 0.02 | 0.05 ± 0.05 | 1.87 | 0.14 ± 0.02 | 0.16 ± 0.02 | 0.38 ± 0.07 | ||
| EMILES iP | 0.76 | 0.04 ± 0.02 | 0.12 ± 0.02 | 0.07 ± 0.06 | 1.11 | 0.14 ± 0.02 | 0.14 ± 0.02 | 0.26 ± 0.04 | ||
| CvD18 | 1.51 | 0.06 ± 0.02 | 0.08 ± 0.02 | 0.01 ± 0.08 | 1.23 | 0.17 ± 0.02 | 0.14 ± 0.02 | 0.27 ± 0.04 | ||
| EMILES iT-IMF | 1.94 | 0.07 ± 0.01 | 0.19 ± 0.02 | 0.09 ± 0.05 | 1.34 | 0.16 ± 0.02 | 0.15 ± 0.02 | 0.37 ± 0.08 | ||
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