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Table 4
Spearman cross-correlation coefficients, ρ, of potential chemical clocks vs. the stellar age, Teff, [Fe/H], and M using the subsample with the most reliable stellar ages.
| Element | Teff | [Fe/H] | M | Age |
|---|---|---|---|---|
| [Y/Mg] | 0.47 | 0.62 | 0.68 | −0.86 |
| [Y/Zn] | 0.59 | 0.39 | 0.59 | −0.80 |
| [Y/Al] | 0.66 | 0.37 | 0.58 | −0.78 |
| [Y/Ti II] | 0.45 | 0.66 | 0.66 | −0.86 |
| [Y/Si] | 0.34 | 0.67 | 0.60 | −0.79 |
| [Y/O] | 0.33 | 0.74 | 0.70 | −0.82 |
| [Sr/Mg] | 0.65 | 0.50 | 0.66 | −0.88 |
| [Sr/Zn] | 0.74 | 0.18 | 0.48 | −0.74 |
| [Sr/Al] | 0.78 | 0.21 | 0.49 | −0.73 |
| [Sr/Ti II] | 0.67 | 0.51 | 0.64 | −0.88 |
| [Sr/Si] | 0.64 | 0.42 | 0.57 | −0.83 |
| [Sr/O] | 0.54 | 0.63 | 0.73 | −0.89 |
| [Y/(Mg + Si)] | 0.42 | 0.62 | 0.65 | −0.84 |
| [Y/(Mg + Ti)] | 0.45 | 0.64 | 0.67 | −0.86 |
| [Y/(Ti + Si)] | 0.38 | 0.64 | 0.63 | −0.82 |
| [Y/(Mg + Ti + Si)] | 0.42 | 0.64 | 0.65 | −0.85 |
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