Wide binaries among high-velocity and metal-poor stars

A catalogue of 122 wide binaries is presented. The list was compiled by sea rching for common proper-motion companions to the more than 1200 high-veloc ity and metal-poor stars of Schuster and collaborators. We study the separa tions for the wide binaries ((a) > 25 AU), and find that they follow Oepik' s distribution all the way up to 10 000 AU. A subgroup of them, the ones wi th the most halo-like orbits, follow Oepik's distribution up to 20 000 AU. The galactic orbits of all systems are calculated, and galactic orbital par ameters are used, along with the metallicites, to assign each one to the ol d thin disk, the thick disk, or the halo population.