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Table 2.
Accuracy and precision of our relations in recovering the ages of clusters in each of the defined regions and globally.
| RGC > 9 | ||
|---|---|---|
| Ratio | Accuracy (Gyr) | Precision (Gyr) |
| [Y II/Mg I] | −0.2 | 2.1 |
| [Y II/Al I] | 0.6 | 2.2 |
| [Y II/Si I] | 0.1 | 2.9 |
| [Y II/Ca I] | −0.1 | 4.7 |
| [Y II/Ti I] | 0.2 | 1.7 |
| [Ba II/Mg I] | −0.5 | 1.0 |
| [Ba II/Al I] | 0.1 | 0.9 |
| [Ba II/Si I] | 0.3 | 1.3 |
| [Ba II/Ca I] | −0.5 | 2.0 |
| [Ba II/Ti I] | 0.1 | 1.1 |
| 7 < RGC < 9 (kpc) (*) | ||
| [Y II/Mg I] | −1.6 (−1.6) | 2.8 (2.1) |
| [Y II/Al I] | −0.3 (−0.1) | 2.1 (1.9) |
| [Y II/Si I] | 0.5 (0.6) | 3.4 (3.5) |
| [Y II/Ca I] | −1.3 (−0.9) | 3.3 (3.3) |
| [Y II/Ti I] | −0.7 (−0.1) | 3.8 (3.1) |
| [Ba II/Mg I] | −0.3 (0.3) | 3 (2.4) |
| [Ba II/Al I] | −1.4 (−0.9) | 2.4 (2.3) |
| [Ba II/Si I] | −0.4 (−0.3) | 2.9 (2.6) |
| [Ba II/Ca I] | −0.3 (−0.1) | 2.6 (2.6) |
| [Ba II/Ti I] | −0.6 (0.1) | 2.8 (2.5) |
| RGC < 7 (kpc) | ||
| [Y II/Mg I] | 2.0 | 7.0 |
| [Y II/Al I] | −0.1 | 0.8 |
| [Y II/Si I] | 1.2 | 4.9 |
| [Y II/Ca I] | 0.9 | 2.9 |
| [Y II/Ti I] | −0.4 | 1.3 |
| [Ba II/Mg I] | 0.7 | 2.3 |
| [Ba II/Al I] | −0.0 | 0.4 |
| [Ba II/Si I] | 0.2 | 0.9 |
| [Ba II/Ca I] | 2.2 | 5.5 |
| [Ba II/Ti I] | −0.1 | 0.4 |
| 6 < RGC < 20 (kpc) | ||
| [Y II/Mg I] | −1.3 | 3.1 |
| [Y II/Al I] | −0.3 | 2.7 |
| [Y II/Si I] | 0.0 | 3.2 |
| [Y II/Ca I] | −0.3 | 3.7 |
| [Y II/Ti I] | −0.1 | 2.4 |
| [Ba II/Mg I] | −1.2 | 1.5 |
| [Ba II/Al I] | −0.6 | 1.3 |
| [Ba II/Si I] | −0.3 | 1.7 |
| [Ba II/Ca I] | −0.2 | 1.8 |
| [Ba II/Ti I] | −0.2 | 1.5 |
Notes. (*)Results after removing discrepant OCs are included in parentheses.
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