Table 2.
Physical characteristics of the Gaia benchmark testing stars.
| Star | Teff | eTeff | log g | elog g | [Fe/H] | e[Fe/H] | [Mg]H | e[Mg]H | [Al]H | e[Al]H | [Si]H | e[Si]H |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 18 Sco | 5810 | 80 | 4.44 | 0.03 | 0.01 | 0.03 | 0.00 | 0.02 | −0.02 | 0.04 | 0.05 | 0.02 |
| HD22879 | 5868 | 89 | 4.27 | 0.04 | −0.88 | 0.05 | −0.49 | 0.04 | −0.65 | 0.04 | −0.55 | 0.04 |
| α Cen A | 5792 | 16 | 4.31 | 0.01 | 0.24 | 0.08 | 0.20 | 0.03 | 0.19 | 0.05 | 0.28 | 0.06 |
| α Cen B | 5231 | 20 | 4.53 | 0.03 | 0.22 | 0.10 | 0.19 | 0.04 | 0.12 | 0.01 | 0.29 | 0.04 |
| β Hyi | 5873 | 45 | 3.98 | 0.02 | −0.07 | 0.06 | −0.04 | 0.01 | −0.05 | 0.01 | −0.03 | 0.02 |
| β Vir | 6083 | 41 | 4.10 | 0.02 | 0.21 | 0.07 | 0.11 | 0.03 | 0.11 | 0.01 | 0.18 | 0.05 |
| ϵ Eri | 5076 | 30 | 4.61 | 0.03 | −0.10 | 0.06 | −0.17 | 0.06 | 0.01 | 0.04 | −0.04 | 0.05 |
| μ Ara | 5902 | 46 | 4.30 | 0.03 | 0.33 | 0.13 | 0.32 | 0.04 | 0.40 | 0.02 | 0.36 | 0.03 |
| Procyon | 6554 | 84 | 4.00 | 0.02 | −0.04 | 0.08 | 0.01 | 0.06 | −0.14 | 0.05 | 0.09 | 0.04 |
| τ Cet | 5414 | 21 | 4.49 | 0.02 | −0.50 | 0.03 | −0.28 | 0.05 | −0.23 | 0.01 | −0.37 | 0.04 |
| [Ti]H | e[Ti]H | [Zn]H | e[Zn]H | [Sr]H | e[Sr]H | [Y]H | e[Y]H | Age | eAge | |||
| 18 Sco | 0.04 | 0.02 | −0.02 | 0.03 | 0.04 | 0.08 | 0.04 | 0.02 | 4.0 | 1.0 | ||
| HD22879 | −0.51 | 0.03 | −0.70 | 0.03 | −0.69 | 0.08 | −0.82 | 0.03 | 10.0 | 2.0 | ||
| α Cen A | 0.21 | 0.03 | 0.25 | 0.01 | 0.13 | 0.08 | 0.17 | 0.03 | 5.5 | 1.5 | ||
| α Cen B | 0.26 | 0.07 | 0.16 | 0.06 | 0.21 | 0.17 | 0.11 | 0.11 | 5.5 | 1.5 | ||
| β Hyi | −0.04 | 0.03 | −0.02 | 0.03 | −0.14 | 0.08 | −0.09 | 0.06 | 6.0 | 1.0 | ||
| β Vir | 0.09 | 0.02 | 0.16 | 0.03 | 0.07 | 0.08 | 0.18 | 0.08 | 3.0 | 1.0 | ||
| ϵ Eri | −0.05 | 0.05 | −0.18 | 0.07 | 0.06 | 0.17 | −0.03 | 0.11 | 0.65 | 0.25 | ||
| μ Ara | 0.41 | 0.04 | 0.34 | 0.03 | 0.30 | 0.08 | 0.26 | 0.04 | 6.0 | 2.0 | ||
| Procyon | 0.00 | 0.04 | 0.05 | 0.05 | 0.13 | 0.08 | 0.11 | 0.09 | 2.0 | 0.5 | ||
| τ Cet | −0.21 | 0.03 | −0.46 | 0.05 | −0.56 | 0.08 | −0.68 | 0.06 | 7.0 | 3.0 | ||
Notes. The symbol [X]H represents the element X abundance with respect to hydrogen ([X/H]), and “e[X]H” represents the uncertainty of this measurement. The stellar parameters were taken from the Gaia benchmark papers Heiter et al. (2015) and Jofré et al. (2014). The chemical abundances were derived in this work. See text for details.
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