HR diagram, where the 211 Sun-like stars (according to their T_eff, L, and P_rot) are highlighted in shades of red, which indicate the respective metallicity. The Sun is marked by the blue star. The top and right panels show the T_eff and L distributions, where the dashed blue lines mark the solar values. The symbols with a black outline mark the targets with spectroscopic constraints. As a reference, the gray dots show targets from the full target sample.