We analyze a new kinematic survey that includes accurate proper motionsderived from SDSS DR7 positions, combined with multi-epoch measurementsfrom the GSC-II database. By means of the SDSS spectro-photometric data(effective temperature, surface gravity, metallicity, and radialvelocities), we estimate photometric parallaxes for a sample of27000FGK (sub)dwarfs with,which we adopted as tracers of the seven-dimensional space distribution(kinematic phase distribution plus chemical abundance) of the thickdisk and inner halo within a few kiloparsecs of the Sun.We find evidence of a kinematics-metallicity correlation,kms-1dex-1,amongst thick disk stars located between one and three kiloparsecs fromthe plane and with abundance,while no significant correlation is present for.In addition, we estimate a shallow vertical rotation velocity gradient,kms-1kpc-1,for the thick disk between 1kpc展开▼
