Identification of blue high proper motion objects in the Tycho-2 and 2MASS catalogues using Virtual Observatory tools

摘要

Aims. With available Virtual Observatory tools, we looked for new bright blue high proper motion objects in the entire sky: white dwarfs, hot subdwarfs, runaway OB stars, and early-type stars in nearby young moving groups. Methods. We performed an all-sky cross-match between the optical Tycho-2 and near-infrared 2MASS catalogues with Aladin, and selected objects with proper motions μ?>?50?mas?yr-1 and colours VT???Ks?