The Solar Neighborhood. XXXV. Distances to 1404 m Dwarf Systems Within 25 pc in the Southern Sky
Abstract
We present trigonometric, photometric, and photographic distances to 1748 southern (δ ≤slant 0{}^\circ ) M dwarf systems with μ ≥slant 0\cdot {\prime\prime }18 yr-1, of which 1404 are believed to lie within 25 pc of the Sun. The stars have 6.67≤slant {{V}J}≤slant 21.38 and 3.50≤slant ({{V}J}-{{K}s})≤slant 9.27, covering the entire M dwarf spectral sequence from M0.0 V through M9.5 V. This sample therefore provides a comprehensive snapshot of our current knowledge of the southern sky for the nearest M dwarfs that dominate the stellar population of the Galaxy. Roughly one-third of the 1748 systems, each of which has an M dwarf primary, have published high quality parallaxes, including 179 from the REsearch Consortium On Nearby Stars astrometry program. For the remaining systems, we offer photometric distance estimates that have well-calibrated errors. The bulk of these (∼700) are based on new {{V}J}{{R}KC}{{I}KC} photometry acquired at the CTIO/SMARTS 0.9 m telescope, while the remaining 500 primaries have photographic plate distance estimates calculated using SuperCOSMOS {{B}J}{{R}59F}{{I}IVN} photometry. Confirmed and candidate subdwarfs in the sample have been identified, and a census of companions is included.
- Publication:
-
The Astronomical Journal
- Pub Date:
- January 2015
- DOI:
- 10.1088/0004-6256/149/1/5
- arXiv:
- arXiv:1407.7837
- Bibcode:
- 2015AJ....149....5W
- Keywords:
-
- parallaxes;
- solar neighborhood;
- stars: distances;
- stars: low-mass;
- stars: statistics;
- techniques: photometric;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- accepted by The Astronomical Journal on 25 July, 2014