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Table 7.

Reference stars used to compute differential abundances in each defined group.

Star Teff (K) log g (dex) [Fe/H] (dex) N
6286 ± 17 4.30 ± 0.04 0.13 ± 0.06 3
6126 ± 19 4.41 ± 0.04 0.11 ± 0.06 3
5957 ± 32 4.49 ± 0.03 0.12 ± 0.05 4
5834 ± 19 4.57 ± 0.04 0.17 ± 0.05 5
5582 ± 23 4.63 ± 0.02 0.14 ± 0.04 3
5351 ± 20 4.61 ± 0.04 0.14 ± 0.06 1
5107 ± 16 4.61 ± 0.03 0.16 ± 0.05 1
4975 ± 12 2.83 ± 0.03 0.10 ± 0.05 2

Notes. We indicate the Gaia DR2 source ID, Hipparcos ID, the computed atmospheric parameters, iron bracket abundance, and the number of analyzed spectra. For stars with more than one spectra, we indicate the mean values and standard deviations of all determinations.

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