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Crossmatching of high-proper motion L, T, and Y brown dwarfs with large photometric surveys
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SYSNO ASEP 0576248 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Crossmatching of high-proper motion L, T, and Y brown dwarfs with large photometric surveys Author(s) Avdeeva, A.S. (RU)
Karpov, Sergey (FZU-D) ORCID, RID
Malkov, O.Yu. (RU)Number of authors 3 Article number 20220214 Source Title Open Astronomy. - : Walter de Gruyter - ISSN 2543-6376
Roč. 32, č. 1 (2023)Number of pages 8 s. Language eng - English Country DE - Germany Keywords catalogs ; surveys ; crossmatching ; brown dwarfs Subject RIV BN - Astronomy, Celestial Mechanics, Astrophysics OECD category Astronomy (including astrophysics,space science) Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 000933645800001 EID SCOPUS 85148769472 DOI https://doi.org/10.1515/astro-2022-0214 Annotation L, T, and Y brown dwarf (BD) exploration is a topical issue. First, the transition boundary between planets and BDs is not fully understood yet. Second, there is a phenomenon called the L/T-transition. The observed properties of cooler BDs differ significantly from the less cool ones, namely, colors of BDs shift much bluer and, simultaneously, dwarfs become brighter with a decrease in temperature. Models of this phenomenon are now being actively developed, for which reason BDs observed in a wide range of spectra are needed. Our goal is to refine the position of BDs in the parameter space of colors and magnitudes in order to effectively search for them in photometric surveys (without involving spectroscopic observations). For that reason, we crossmatched about 500 known L, T, and Y BDs with large photometric surveys. We paid special attention to the problem of identifying objects near the Sun because the crossmatching by default is made by searching for the closest object in a particular survey, which can be inappropriate concerning the high proper motions of our dwarfs. We have determined the color indices that can be used to search for these objects in large photometric surveys, and we have pointed out the color indices that are inappropriate for this purpose. We also made preliminary estimates of the radius matching to search for objects in the modern photometric surveys, given their proximity to the Sun and, consequently, their high proper motion. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2024 Electronic address https://hdl.handle.net/11104/0345829
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