Search Publications

Duplicity amongst HIPPARCOS stars.

Tucholke, H. -J.; Brosche, P.; Odenkirchen, M.

Stars observed by the astrometry satellite Hipparcos may be unknown double stars. A subsample of those are dangerous for the extragalactic link of Hipparcos proper motions by long-term photographic proper motions, if the time base of Hipparcos is too short to detect the orbital motion. The probability of these cases and the typical size of the pho…