UCAC3 PROPER MOTION SURVEY. I. DISCOVERY OF NEW PROPER MOTION STARS IN UCAC3 WITH 0.″40 yr–1> μ ⩾ 0.″18 yr–1BETWEEN DECLINATIONS –90° AND –47°

2010/07/19 by Charlie T. Finch, N. Zacharias, Norbert Zacharias +1 · 14 citations
Engineering · Physics and Astronomy · #Astrometry #Astronomical Observations and Instrumentation #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Declination #Geodesy #Geography #Motion (physics) #Observatory #Photometry (optics) #Physics #Proper motion #Right ascension #Sky #Stars #Stellar, planetary, and galactic studies #astro-ph.SR

paper · pdf · doi:10.1088/0004-6256/140/3/844

published in The Astronomical Journal 140(3), 844-869 (Institute of Physics) · 24 pages, 7 figures, 4 tables, accepted to the Astronomical Journal July 07, 2010

arxiv created 2010/07/19 · openalex publication_date 2010/08/11 · arxiv updated 2015/05/19 · openalex created_date 2021/02/01 · openalex updated_date 2026/08/05

Abstract

Presented here are 442 new proper motion stellar systems in the southern sky between declinations -90\degr and -47\degr with 0\farcs40 yr^-1 > μ ≥ 0\farcs18 yr^-1. These systems constitute a 25.3% increase in new systems for the same region of the sky covered by previous SuperCOSMOS RECONS (SCR) searches that used Schmidt plates as the primary source of discovery. Among the new systems are 25 multiples, plus an additional seven new common proper motion companions found to previously known primaries. All stars have been discovered using the third U.S. Naval Observatory (USNO) CCD Astrograph Catalog (UCAC3). A comparison of the UCAC3 proper motions to those from the Hipparcos, Tycho-2, Southern Proper Motion (SPM4), and SuperCOSMOS efforts is presented, and shows that UCAC3 provides similar values and precision to the first three surveys. The comparison between UCAC3 and SuperCOSMOS indicates that proper motions in RA are systematically shifted in the SuperCOSMOS data but are consistent in DEC data, while overall showing a significantly higher scatter. Distance estimates are derived for stars having SuperCOSMOS Sky Survey (SSS) B_J, R_59F, and I_IVN plate magnitudes and Two-Micron All Sky Survey (2MASS) infrared photometry. We find 15 systems estimated to be within 25 pc, including UPM 1710-5300 our closest new discovery estimated at 13.5 pc. Such new discoveries suggest that more nearby stars are yet to be found in these slower proper motion regimes, indicating that more work is needed to develop a complete map of the solar neighborhood.

Citations

• New High Proper Motion Stars from the Digitized Sky Survey. III. Stars with Proper Motions 0."45 < μ < 2."0 yr-1South of Declination -30°
• NEW HIGH PROPER MOTION STARS FROM THE DIGITIZED SKY SURVEY. IV. COMPLETION OF THE SOUTHERN SURVEY AND 170 ADDITIONAL STARS WITH μ > 0.45″ yr–1
• Improved Astrometry and Photometry for the Luyten Catalog. II. Faint Stars and the Revised Catalog
• Southern infrared proper motion survey. II. A sample of low mass stars with \mathsfμ ≥ 0.1''/ yr
• The Solar Neighborhood. X. New Nearby Stars in the Southern Sky and Accurate Photometric Distance Estimates for Red Dwarfs
• The Second US Naval Observatory CCD Astrograph Catalog (UCAC2)