HR diagram of targets with known APs and parallaxes. The symbols are color coded by log g derived from spectra (Sect. 3.2). The four lithium-rich sub-giant or giant stars are enclosed in open squares (Sect. 3.4). The evolutionary tracks from the ZAMS of Girardi et al. (2000) are shown as solid lines with the labels representing their masses. The dashed and dotted lines display the ZAMS with solar metallicity (Z = 0.019) and Z = 0.001 by the same authors, respectively.