Fig. 8
Position on the Teff – log g plane of the Gaia FGK benchmark stars (Heiter et al. 2015b, see also Sect. 4.1) analyzed in iDR4, colored according to their [Fe/H]. A few of the cooler benchmarks (Teff< 4000 K) described in Sect. 4.2 were also analyzed in iDR4. The whole GES iDR4 sample is reported in the background as smaller gray squares.
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