Microlensing brown-dwarf companions in binaries detected during the 2022 and 2023 seasons

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dc.citation.issueNovember 2024
dc.citation.volume691
dc.contributor.authorHan C
dc.contributor.authorBond IA
dc.contributor.authorUdalski A
dc.contributor.authorLee C-U
dc.contributor.authorGould A
dc.contributor.authorAlbrow MD
dc.contributor.authorChung S-J
dc.contributor.authorHwang K-H
dc.contributor.authorJung YK
dc.contributor.authorRyu Y-H
dc.contributor.authorShvartzvald Y
dc.contributor.authorShin I-G
dc.contributor.authorYee JC
dc.contributor.authorYang H
dc.contributor.authorZang W
dc.contributor.authorCha S-M
dc.contributor.authorKim D
dc.contributor.authorKim D-J
dc.contributor.authorKim S-L
dc.contributor.authorLee D-J
dc.contributor.authorLee Y
dc.contributor.authorPark B-G
dc.contributor.authorPogge RW
dc.contributor.authorAbe F
dc.contributor.authorBando K
dc.contributor.authorBarry R
dc.contributor.authorBennett DP
dc.contributor.authorBhattacharya A
dc.contributor.authorFujii H
dc.contributor.authorFukui A
dc.contributor.authorHamada R
dc.contributor.authorHamada S
dc.contributor.authorHamasaki N
dc.contributor.authorHirao Y
dc.contributor.authorIshitani Silva S
dc.contributor.authorItow Y
dc.contributor.authorKirikawa R
dc.contributor.authorKoshimoto N
dc.contributor.authorMatsubara Y
dc.contributor.authorMiyazaki S
dc.contributor.authorMuraki Y
dc.contributor.authorNagai T
dc.contributor.authorNunota K
dc.contributor.authorOlmschenk G
dc.contributor.authorRanc C
dc.contributor.authorRattenbury NJ
dc.contributor.authorSatoh Y
dc.contributor.authorSumi T
dc.contributor.authorSuzuki D
dc.contributor.authorTomoyoshi M
dc.contributor.authorTristram PJ
dc.contributor.authorVandorou A
dc.contributor.authorYama H
dc.contributor.authorYamashita K
dc.contributor.authorMróz P
dc.contributor.authorSzymański MK
dc.contributor.authorSkowron J
dc.contributor.authorPoleski R
dc.contributor.authorSoszyński I
dc.contributor.authorPietrukowicz P
dc.contributor.authorKozlowski S
dc.contributor.authorRybicki KA
dc.contributor.authorIwanek P
dc.contributor.authorUlaczyk K
dc.contributor.authorWrona M
dc.contributor.authorGromadzki M
dc.contributor.authorMróz MJ
dc.date.accessioned2025-01-14T23:57:59Z
dc.date.available2025-01-14T23:57:59Z
dc.date.issued2024-11
dc.description.abstractAims. Building on previous works to construct a homogeneous sample of brown dwarfs in binary systems, we investigate microlensing events detected by the Korea Microlensing Telescope Network (KMTNet) survey during the 2022 and 2023 seasons. Methods. Given the difficulty in distinguishing brown-dwarf events from those produced by binary lenses with nearly equal-mass components, we analyze all lensing events detected during the seasons that exhibit anomalies characteristic of binary-lens systems. Results. Using the same criteria consistently applied in previous studies, we identify six additional brown dwarf candidates through the analysis of lensing events KMT-2022-BLG-0412, KMT-2022-BLG-2286, KMT-2023-BLG-0201, KMT-2023-BLG-0601, KMT-2023-BLG-1684, and KMT-2023-BLG-1743. An examination of the mass posteriors shows that the median mass of the lens companions ranges from 0.02 M⊙ to 0.05 M⊙, indicating that these companions fall within the brown-dwarf mass range. The mass of the primary lenses ranges from 0.11 M⊙ to 0.68 M⊙, indicating that they are low-mass stars with substantially lower masses compared to the Sun.
dc.description.confidentialfalse
dc.identifier.citationHan C, Bond IA, Udalski A, Lee CU, Gould A, Albrow MD, Chung SJ, Hwang KH, Jung YK, Ryu YH, Shvartzvald Y, Shin IG, Yee JC, Yang H, Zang W, Cha SM, Kim D, Kim DJ, Kim SL, Lee DJ, Lee Y, Park BG, Pogge RW, Abe F, Bando K, Barry R, Bennett DP, Bhattacharya A, Fujii H, Fukui A, Hamada R, Hamada S, Hamasaki N, Hirao Y, Silva SI, Itow Y, Kirikawa R, Koshimoto N, Matsubara Y, Miyazaki S, Muraki Y, Nagai T, Nunota K, Olmschenk G, Ranc C, Rattenbury NJ, Satoh Y, Sumi T, Suzuki D, Tomoyoshi M, Tristram PJ, Vandorou A, Yama H, Yamashita K, Mróz P, Szymański MK, Skowron J, Poleski R, Soszyński I, Pietrukowicz P, Kozlowski S, Rybicki KA, Iwanek P, Ulaczyk K, Wrona M, Gromadzki M, Mróz MJ. (2024). Microlensing brown-dwarf companions in binaries detected during the 2022 and 2023 seasons. Astronomy and Astrophysics. 691. November 2024.
dc.identifier.doi10.1051/0004-6361/202451416
dc.identifier.eissn1432-0746
dc.identifier.elements-typejournal-article
dc.identifier.issn0004-6361
dc.identifier.numberA237
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/72372
dc.languageEnglish
dc.publisherEDP Sciences for The European Southern Observatory
dc.publisher.urihttps://www.aanda.org/articles/aa/full_html/2024/11/aa51416-24/aa51416-24.html
dc.relation.isPartOfAstronomy and Astrophysics
dc.rights(c) The author/sen
dc.rights.licenseCC BYen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectgravitational lensing
dc.titleMicrolensing brown-dwarf companions in binaries detected during the 2022 and 2023 seasons
dc.typeJournal article
pubs.elements-id492601
pubs.organisational-groupOther
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