Crossmatching of high-proper motion L, T, and Y brown dwarfs with large photometric surveys
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...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2023-02-01
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| Series: | Open Astronomy |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/astro-2022-0214 |
| _version_ | 1811159411010306048 |
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| author | Avdeeva Aleksandra S. Karpov Sergey V. Malkov Oleg Yu. |
| author_facet | Avdeeva Aleksandra S. Karpov Sergey V. Malkov Oleg Yu. |
| author_sort | Avdeeva Aleksandra S. |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-10T05:40:36Z |
| format | Article |
| id | doaj.art-0a07b5ba9948469f8060ef2bf93749d4 |
| institution | Directory Open Access Journal |
| issn | 2543-6376 |
| language | English |
| last_indexed | 2024-04-10T05:40:36Z |
| publishDate | 2023-02-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Astronomy |
| spelling | doaj.art-0a07b5ba9948469f8060ef2bf93749d42023-03-06T10:24:51ZengDe GruyterOpen Astronomy2543-63762023-02-0132112153910.1515/astro-2022-0214Crossmatching of high-proper motion L, T, and Y brown dwarfs with large photometric surveysAvdeeva Aleksandra S.0Karpov Sergey V.1Malkov Oleg Yu.2Institute of Astronomy, 48 Pyatnitskaya St., Moscow 119017, RussiaInstitute of Physics, Czech Acad. Sci., 182 21 Prague 8, Czech RepublicInstitute of Astronomy, 48 Pyatnitskaya St., Moscow 119017, RussiaL, 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.https://doi.org/10.1515/astro-2022-0214catalogssurveyscrossmatchingbrown dwarfs |
| spellingShingle | Avdeeva Aleksandra S. Karpov Sergey V. Malkov Oleg Yu. Crossmatching of high-proper motion L, T, and Y brown dwarfs with large photometric surveys Open Astronomy catalogs surveys crossmatching brown dwarfs |
| title | Crossmatching of high-proper motion L, T, and Y brown dwarfs with large photometric surveys |
| title_full | Crossmatching of high-proper motion L, T, and Y brown dwarfs with large photometric surveys |
| title_fullStr | Crossmatching of high-proper motion L, T, and Y brown dwarfs with large photometric surveys |
| title_full_unstemmed | Crossmatching of high-proper motion L, T, and Y brown dwarfs with large photometric surveys |
| title_short | Crossmatching of high-proper motion L, T, and Y brown dwarfs with large photometric surveys |
| title_sort | crossmatching of high proper motion l t and y brown dwarfs with large photometric surveys |
| topic | catalogs surveys crossmatching brown dwarfs |
| url | https://doi.org/10.1515/astro-2022-0214 |
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