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 onethird 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 wellcalibrated 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:
 10.1088/00046256/149/1/5
 arXiv:
 arXiv:1407.7837
 Bibcode:
 2015AJ....149....5W
 Keywords:

 parallaxes;
 solar neighborhood;
 stars: distances;
 stars: lowmass;
 stars: statistics;
 techniques: photometric;
 Astrophysics  Solar and Stellar Astrophysics
 EPrint:
 accepted by The Astronomical Journal on 25 July, 2014