Results of our parameters from spectral synthesis in comparison with those of M22. The panels show the differences (this work–M22) in T_eff (upper panel), log g_trig (central panel) and [Fe/H] (lower panel) as a function of the respectively parameters derived in M22. The orange points in all panels indicate stars with differences higher than 3σ. The shaded areas correspond to the 1σ of the differences from the median. The dashed lines show the median differences for each parameter while the solid lines are zero.