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Searching for Brown Dwarfs in Large Photometric Surveys: WISE, 2MASS, and DES

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Abstract

Homogeneous and complete samples of brown dwarfs are needed for various kinds of studies: kinematic studies of the Galaxy, studies of binary stars with brown dwarfs, refinement of the low-mass end of the initial mass function, etc. According to various estimates, brown dwarfs can make up to 25% of the population of the Galaxy; however, the discovery of brown dwarfs with spectroscopic methods is extremely labor-intensive. In this paper, we present the cross-identification of the known nearest brown dwarfs from the 2021 list with the DES optical survey and the creation of photometric rules based on the detection of brown dwarfs in three surveys: WISE, 2MASS, and DES. Moreover, we present different photometric rules for each of the three families of brown dwarfs: bright, transit, and faint. No such division has been made yet.

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Notes

  1. The K2021 list includes the objects, whose distance does not exceed 20 pc.

  2. According to the diagram number, the maximum number of flags is 5.

  3. https://datalab.noirlab.edu/gaia.php

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ACKNOWLEDGMENTS

The authors are grateful to the reviewer for careful reading of the paper and comments made.

Funding

The work was supported by the Ministry of Science and Higher Education of the Russian Federation within the framework of the grant No. 075-15-2022-1228 (13.2251.21.0177).

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Authors and Affiliations

  1. Institute of Astronomy, Russian Academy of Sciences, 119017, Moscow, Russia

    A. S. Avdeeva & O. Yu. Malkov

  2. National Research University ‘‘Higher School of Economics’’, 101000, Moscow, Russia

    A. S. Avdeeva

  3. Special Astrophysical Observatory, Russian Academy of Sciences, 369167, Nizhnii Arkhyz, Russia

    S. V. Karpov

  4. Central European Institute of Cosmology and Fundamental Physics, Institute of Physics, Czech Academy of Sciences, 18221, Prague, Czech Republic

    S. V. Karpov

Authors
  1. A. S. Avdeeva
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  2. S. V. Karpov
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  3. O. Yu. Malkov
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Correspondence to A. S. Avdeeva.

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Translated by N. Oborina

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Avdeeva, A.S., Karpov, S.V. & Malkov, O.Y. Searching for Brown Dwarfs in Large Photometric Surveys: WISE, 2MASS, and DES. Astrophys. Bull. 78, 209–216 (2023). https://doi.org/10.1134/S1990341323020013

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  • DOI: https://doi.org/10.1134/S1990341323020013

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