TAPOGEE/DR14 radial velocity of the stars against their metallicity (gray dots). The red filled circles are the new highest-likelihood cluster members analyzed in this work, while the blue filled circle is the giant star analyzed in Schiavon et al. (2017a). The gray and green shadow region defines the upper and lower limits for the membership selection, and the black dotted line marks the radial velocity (−21.1 km s⁻¹) of NGC 6522 according to Harris (1996).