Table 3
Atmospheric parameters and Galactic membership for the sample of Gaia benchmark stars.
| Star | Teff | log g | [Fe/H]non-LTE | Teff (Hα) | log giso | Spectra | Instrument | Galactic |
|---|---|---|---|---|---|---|---|---|
| (K) | (dex) | (dex) | (K) | (dex) | membership | |||
| Sun | 5771(a) ± 1 | 4.44 | + 0.03 | 5767 ± 10 | – | 47 | HARPS | – |
| β Hyi | 5873(b) ± 45 | 3.98 | −0.04 | 5763 ± 19 | 3.94 ± 0.03 | 4/1 | HARPS/UVES | – |
| τ Cet | 5414(b) ± 21 | – | −0.49 | 5366 ± 24 | 4.52 ± 0.03 | 8/4 | HARPS / UVES | – |
| δ Eri | 4954(b) ± 30 | 3.76 | + 0.06 | 5007 ± 26 | 3.74 ± 0.04 | 5 | HARPS | – |
| β Vir | 6083(b) ± 41 | 4.10 | + 0.24 | 6068 ± 18 | 4.08 ± 0.04 | 3 | HARPS | – |
| η Boo | 6099(b) ± 28 | 3.79 | + 0.32 | 6027 ± 21 | – | 5/1 | HARPS/UVES | – |
| α Cen A | 5792(b) ± 16 | 4.31 | + 0.26 | 5762 ± 16 | – | 1 | HARPS | – |
| 18 Sco | 5810(b) ± 80 | 4.44 | + 0.03 | 5775 ± 26 | 4.41 ± 0.04 | 7/6 | HARPS/UVES | – |
| β Gem | 4858(b) ± 60 | 2.90 | + 0.13 | 4860 ± 18 | – | 2 | HARPS | – |
| ξ Hya | 5044(b) ± 40 | 2.87 | + 0.16 | 5043 ± 26 | 2.85 ± 0.03 | 6 | HARPS | – |
| ϵ Vir | 4983(b) ± 61 | 2.77 | + 0.15 | 5036 ± 16 | 2.77 ± 0.04 | 2 | HARPS | – |
| HD 49933 | 6635(b) ± 91 | 4.20 | − 0.41 | 6631 ± 18 | 4.22 ± 0.04 | 3 | HARPS | – |
| HD 140283 | 5792(b, ♦) ± 55 | 3.65(♦) | − 2.28(♠) | 5810 ± 32 | 3.67 ± 0.02 | 1/5 | HARPS/UVES | GE(†) |
| ϵ For | 5123(c) ± 78 | – | − 0.60 | 5042 ± 17 | 3.64 ± 0.04 | 3 | HARPS | – |
| HD 107328 | 4496(c) ± 59 | 2.09 | − 0.33 | 4498 ± 18 | 2.07 ± 0.07 | 1 | HARPS | – |
| HD 84937 | 6356(c) ± 97 | 4.06 | − 2.03 | 6358 ± 33 | 4.13 ± 0.03 | 3/2 | HARPS/ UVES | GE (†) |
| HD 22879 | 5868(c) ± 89 | 4.27 | − 0.86 | 5894 ± 23 | 4.27 ± 0.04 | 7 | HARPS | – |
| HD 298986 | 6223(d) ± 100 | 4.19 | − 1.26 | 6177 ± 39 | 4.28 ± 0.04 | 3 | UVES | HS (†) |
| HD 106038 | 6121(d) ± 80 | 4.55 | − 1.25 | 6094 ± 43 | 4.29 ± 0.04 | 5 | UVES | GE (†)/ Sq (‡) |
| HD 201891 | 5948(d) ± 80 | 4.30 | − 0.97 | 6007 ± 37 | 4.34 ± 0.04 | 1 | UVES | – |
| HD 102200 | 6155(d) ± 80 | 4.22 | − 1.12 | 6246 ± 19 | 4.36 ± 0.04 | 2 | HARPS | – |
Notes. The second, third, and fourth columns list the reference Teff, log g, and [Fe/H] (this last one under non-LTE) as listed in Jofré et al. (2018). The codes indicate the following: (a) direct measurement of the stellar radius and irradiance; (b)interferometric measurements of the stellar angular diameter; (c)photometric calibrations based on interferometric measurements; (d)IRFM; (♦) Interferometric measurements from Karovicova et al. (2020); and (♠)3D non-LTE abundances from Fe II lines from Amarsi et al. (2016). The fifth column lists the temperatures determined here by Hα fitting, with their internal uncertainties. For the total uncertainties, one has to further include the estimated model accuracy error of ± 50 K (as discussed in Sect. 3.4). The seventh column lists the number of spectra used in the analysis, followed by a column that lists the instrument related to the spectra. In the last column, the Galactic membership is provided. GE stands for Gaia-Enceladus, HS for Helmi streams, and Sq for Sequoia (see Sect. 5). The remaining GBS belong to the thin and thick disks. (†) Membership according to the criterion of Massari et al. (2019). (‡)Membership according to the criterion of Myeong et al. (2019).
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