The Fifth Catalogue of Nearby Stars (CNS5)
Alex Golovin, Sabine Reffert, Andreas Just, Stefan Jordan, Akash Vani,, Hartmut Jahrei{\ss}

TL;DR
The CNS5 catalog compiles the most complete list of stars and brown dwarfs within 25 parsecs of the Sun, utilizing Gaia EDR3, Hipparcos, and ground-based data to analyze stellar content, luminosity functions, and catalog completeness.
Contribution
This work provides the first comprehensive, cleaned, and statistically complete catalog of nearby stars and brown dwarfs within 25 pc, integrating multiple data sources and addressing photometric blending issues.
Findings
CNS5 contains 5931 objects, including stars and brown dwarfs.
The catalog is complete down to 19.7 mag in G-band.
Luminosity functions for main-sequence stars and white dwarfs are derived.
Abstract
We present the compilation of the Fifth Catalogue of Nearby Stars (CNS5), based on astrometric and photometric data from Gaia EDR3 and Hipparcos, and supplemented with parallaxes from ground-based astrometric surveys carried out in the infrared. The aim of the CNS5 is to provide the most complete sample of objects in the solar neighbourhood. For all known stars and brown dwarfs in the 25 pc sphere around the Sun, basic astrometric and photometric parameters are given. Furthermore, we provide the colour-magnitude diagram and various luminosity functions of the stellar content in the solar neighbourhood, and characterise the completeness of the CNS5 catalogue. We compile a sample of stars and brown dwarfs which most likely are located within 25 pc of the Sun, taking space-based parallaxes from Gaia EDR3 and Hipparcos as well as ground-based parallaxes from Best et al. (2021),…
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Taxonomy
TopicsStellar, planetary, and galactic studies · History and Developments in Astronomy · Astronomy and Astrophysical Research
