New High Proper Motion Stars from the Digitized Sky Survey. III. Stars with Proper Motions 0.45" < μ < 2.0" yr-1 South of Declination -30°

We report the discovery of 182 southern stars with proper motion larger than 0.45" yr^-1. The stars were found in an expansion of the SUPERBLINK proper-motion survey to 8980 deg² south of decl.=-30^deg. The new high proper motion stars include 123 objects with μ>0.5" yr^-1 and 5 with μ>1.0" yr^-1. These newfound stars consist of a variety of nearby red dwarfs and white dwarfs and (slightly more distant) red halo subdwarfs, and they are all prime targets for follow-up spectroscopic and astrometric (parallax) observations. Comparison with previous proper-motion surveys in the southern sky suggests that SUPERBLINK has a recovery rate between 80% and 90% at southern declinations for stars with red magnitude 10 mag<R_F<19 mag and proper motion in the range 0.5"<μ<2.0" yr^-1. This survey makes a significant addition to the census of high proper motion stars at southern declinations.

Based on data mining of the Digitized Sky Survey, developed and operated by the Catalogs and Surveys Branch of the Space Telescope Science Institute, Baltimore, Maryland.