The solar neighborhood. XXV. Discovery of new proper motion stars with 0.40yr-1 > μ ≥ 0.18yr-1 between declinations -47° and 00°

Abstract

We present 2817 new southern proper motion systems with 0.40yr-1 > μ ≥ 0.18yr-1 and declination between -47° and 00°. This is a continuation of the SuperCOSMOS-RECONS (SCR) proper motion searches of the southern sky. We use the same photometric relations as previous searches to provide distance estimates based on the assumption that the objects are single main-sequence stars. We find 79 new red dwarf systems predicted to be within 25pc, including a few new components of previously known systems. Two systems - SCR 1731-2452 at 9.5pc and SCR 1746-3214 at 9.9pc - are anticipated to be within 10pc. We also find 23 new white dwarf (WD) candidates with distance estimates of 15-66pc, as well as 360 new red subdwarf candidates. With this search, we complete the SCR sweep of the southern sky for stars with μ ≥ 0.18yr-1 and R 59F ≤ 16.5, resulting in a total of 5042 objects in 4724 previously unreported proper motion systems. Here we provide selected comprehensive lists from our SCR proper motion search to date, including 152 red dwarf systems estimated to be within 25pc (9 within 10pc), 46 WDs (10 within 25pc), and 598 subdwarf candidates. The results of this search suggest that there are more nearby systems to be found at fainter magnitudes and lower proper motion limits than those probed so far. © 2011. The American Astronomical Society. All rights reserved.