Spectroscopic log T_eff vs. log g for the candidate stars. We have employed the Yonsei-Yale ischrones (Demarque et al. 2004) for Z = 0.025 and 0.1, 0.7, 4, and 13 Gyr (from left to right). Mean error bars are represented at the middle right. Blue squares represent stars selected as members by the chemical tagging approach, red diamonds represent those stars that have similar Fe abundances, but different values of other elements. Orange circles represent three Hyades cluster stars (BZ Cet, V683 Per and ϵ Tau). Green triangles represent those stars that do not have similar Fe abundances (as well as dissimilar values of other elements).