The Solar Neighborhood XXXV: Distances to 1404 M Dwarf Systems Within 25 pc in the Southern Sky
Jennifer G. Winters, Todd J. Henry, John C. Lurie, Nigel C. Hambly,, Wei-Chun Jao, Jennifer L. Bartlett, Mark R. Boyd, Sergio B. Dieterich,, Charlie T. Finch, Altonio D. Hosey, Philip A. Ianna, Adric R. Riedel, Kenneth, J. Slatten, John P. Subasavage

TL;DR
This paper provides comprehensive distance measurements and photometric data for 1748 southern M dwarf systems within 25 parsecs, significantly enhancing the catalog of nearby stars and their properties.
Contribution
It offers new photometric distance estimates for systems lacking high-quality parallaxes, expanding the known sample of nearby M dwarfs in the southern sky.
Findings
Approximately one-third of systems have published high-quality parallaxes.
New $V_JR_{KC}I_{KC}$ photometry was obtained for about 700 systems.
Photometric distance estimates were provided for the remaining systems.
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 …
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