Similar to the bottom panels of Fig. 5 for the candidates, but with in the abscissa. Circles represent the stars in Table 2 with T_eff, [Fe/H], and log g close to solar within 1σ errors, while triangles represent all other stars. Filled symbols represent the stars with significant temperature differences, they are also labelled by their HIP number. The dotted blue lines at − 6 K represent the average T_eff difference, computed for the unlabelled stars only.