paper

The Solar Neighborhood XXXV: Distances to 1404 M Dwarf Systems Within 25 pc in the Southern Sky

arXiv:1407.7837 · doi:10.1088/0004-6256/149/1/5

Abstract

We present trigonometric, photometric, and photographic distances to 1748 southern (0) M dwarf systems with 0\farcs18 yr, of which 1404 are believed to lie within 25 parsecs of the Sun. The stars have 6.67 21.38 and 3.50 () 9.27, covering the entire M dwarf spectral sequence from M0.0V through M9.5V. 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 RECONS 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 photometry acquired at the CTIO/SMARTS 0.9m telescope, while the remaining 500 primaries have photographic plate distance estimates calculated using SuperCOSMOS photometry. Confirmed and candidate subdwarfs in the sample have been identified, and a census of companions is included.

accepted by The Astronomical Journal on 25 July, 2014; 75 pages of tables, 11 figures

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