Table 7
Best ten 2D relations with Teff as independent variable.
| Formula | Adj-R2 | S.D. | Mean rel | Rel imp Teff | Rel imp X | a | b | c | Δa | Δb | Δc |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Gyr | Gyr | Gyr K−1 | Gyr dex−1 | Gyr | Gyr K−1 | Gyr dex−1 | |||||
| Teff+ [Y/TiII] | 0.86 | 1.36 | 0.38 | 0.25 | 0.75 | 27.47 | −4.0(−3) | −23.33 | 2.33 | 4(−4) | 0.73 |
| Teff+ [Y/Ti] | 0.85 | 1.61 | 0.33 | 0.27 | 0.73 | 33.15 | −5.0(−3) | −23.77 | 2.29 | 4(−4) | 0.76 |
| Teff+ [Y/Mg] | 0.83 | 1.57 | 0.48 | 0.25 | 0.75 | 26.90 | −3.9(−3) | −20.70 | 2.54 | 4(−4) | 0.72 |
| Teff+ [Ti/Fe] | 0.81 | 1.87 | 0.67 | 0.26 | 0.74 | 25.97 | −3.8(−3) | 30.30 | 2.29 | 4(−4) | 1.07 |
| Teff+ [Si/Fe] | 0.78 | 2.14 | 0.64 | 0.28 | 0.72 | 30.41 | −4.5(−3) | 37.50 | 2.35 | 4(−4) | 1.43 |
| Teff+ [TiII/Fe] | 0.83 | 1.67 | 0.47 | 0.25 | 0.75 | 25.43 | −3.6(−3) | 29.57 | 2.63 | 4(−4) | 1.06 |
| Teff+ [Y/Si] | 0.76 | 2.25 | 0.56 | 0.34 | 0.66 | 39.33 | −6.0(−3) | −24.06 | 2.35 | 4(−4) | 0.99 |
| Teff+ [Sr/Ti] | 0.74 | 2.06 | 0.58 | 0.24 | 0.76 | 9.65 | −1.0(−3) | −23.39 | 3.10 | 5(−4) | 1.02 |
| Teff+ [Sr/Mg] | 0.73 | 2.13 | 0.57 | 0.25 | 0.75 | 14.90 | −1.8(−3) | −19.83 | 3.06 | 5(−4) | 0.91 |
| Teff+ [Y/Zn] | 0.66 | 2.25 | 0.72 | 0.31 | 0.69 | 26.93 | −3.4(−3) | −20.66 | 3.17 | 5(−4) | 1.18 |
Notes. Formula are the independent variables used for estimating the stellar age. “Rel imp X orTeff ” is the relative importance of the variable Xor Teff in the regression. The rest are the linear regression coefficients and their uncertainties. In columns “b” and “Δb”, the form X(Y) represents X × 10Y.
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