Brown dwarf companions in microlensing binaries detected during the 2016-2018 seasons

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dc.citation.volume667
dc.contributor.authorHan C
dc.contributor.authorRyu Y-H
dc.contributor.authorShin I-G
dc.contributor.authorJung YK
dc.contributor.authorKim D
dc.contributor.authorHirao Y
dc.contributor.authorBozza V
dc.contributor.authorAlbrow MD
dc.contributor.authorZang W
dc.contributor.authorUdalski A
dc.contributor.authorBond IA
dc.contributor.authorChung S-J
dc.contributor.authorGould A
dc.contributor.authorHwang K-H
dc.contributor.authorShvartzvald Y
dc.contributor.authorYang H
dc.contributor.authorCha S-M
dc.contributor.authorKim D-J
dc.contributor.authorKim H-W
dc.contributor.authorKim S-L
dc.contributor.authorLee C-U
dc.contributor.authorLee D-J
dc.contributor.authorYee JC
dc.contributor.authorLee Y
dc.contributor.authorPark B-G
dc.contributor.authorPogge RW
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.authorKozłowski S
dc.contributor.authorUlaczyk K
dc.contributor.authorRybicki KA
dc.contributor.authorIwanek P
dc.contributor.authorWrona M
dc.contributor.authorAbe F
dc.contributor.authorBarry R
dc.contributor.authorBennett DP
dc.contributor.authorBhattacharya A
dc.contributor.authorFujii H
dc.contributor.authorFukui A
dc.contributor.authorSilva SI
dc.contributor.authorKirikawa R
dc.contributor.authorKondo I
dc.contributor.authorKoshimoto N
dc.contributor.authorMatsubara Y
dc.contributor.authorMatsumoto S
dc.contributor.authorMiyazaki S
dc.contributor.authorMuraki Y
dc.contributor.authorOkamura A
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.authorToda T
dc.contributor.authorTristram PJ
dc.contributor.authorVandorou A
dc.contributor.authorYama H
dc.contributor.authorItow Y
dc.date.accessioned2023-11-09T19:26:26Z
dc.date.accessioned2023-11-20T01:38:38Z
dc.date.available2022-11-08
dc.date.available2023-11-09T19:26:26Z
dc.date.available2023-11-20T01:38:38Z
dc.date.issued2022-11-08
dc.description.abstractAims. With the aim of finding microlensing binaries containing brown dwarf (BD) companions, we investigate the microlensing survey data collected during the 2016 2018 seasons. Methods. For this purpose, we first modeled lensing events with light curves exhibiting anomaly features that are likely to be produced by binary lenses. We then sorted out BD companion binary-lens events by applying the criterion that the companion-to-primary mass ratio is q 0.1. With this procedure, we identify six binaries with candidate BD companions: OGLE-2016-BLG-0890L, MOA-2017-BLG-477L, OGLE-2017-BLG-0614L, KMT-2018-BLG-0357L, OGLE-2018-BLG-1489L, and OGLE-2018-BLG-0360L. Results. We estimated the masses of the binary companions by conducting Bayesian analyses using the observables of the individual lensing events. According to the Bayesian estimation of the lens masses, the probabilities for the lens companions of the events OGLE-2016-BLG-0890, OGLE-2017-BLG-0614, OGLE-2018-BLG-1489, and OGLE-2018-BLG-0360 to be in the BD mass regime are very high with PBD > 80%. For MOA-2017-BLG-477 and KMT-2018-BLG-0357, the probabilities are relatively low with PBD = 61% and 69%, respectively.
dc.description.confidentialfalse
dc.edition.editionNovember 2022
dc.identifier.citationHan C, Ryu YH, Shin IG, Kil Jung Y, Kim D, Hirao Y, Bozza V, Albrow MD, Zang W, Udalski A, Bond IA, Chung SJ, Gould A, Hwang KH, Shvartzvald Y, Yang H, Cha SM, Kim DJ, Kim HW, Kim SL, Lee CU, Lee DJ, Yee JC, Lee Y, Park BG, Pogge RW, Mroz P, Szymanski MK, Skowron J, Poleski R, Soszynski I, Pietrukowicz P, Kozlowski S, Ulaczyk K, Rybicki KA, Iwanek P, Wrona M, Abe F, Barry R, Bennett DP, Bhattacharya A, Fujii H, Fukui A, Ishitani Silva S, Kirikawa R, Kondo I, Koshimoto N, Matsubara Y, Matsumoto S, Miyazaki S, Muraki Y, Okamura A, Olmschenk G, Ranc C, Rattenbury NJ, Satoh Y, Sumi T, Suzuki D, Toda T, Tristram PJ, Vandorou A, Yama H, Itow Y. (2022). Brown dwarf companions in microlensing binaries detected during the 2016 2018 seasons. Astronomy and Astrophysics. 667.
dc.identifier.doi10.1051/0004-6361/202244186
dc.identifier.eissn1432-0746
dc.identifier.elements-typejournal-article
dc.identifier.issn0004-6361
dc.identifier.numberA64
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/69206
dc.languageEnglish
dc.publisherEDP Sciences on behalf of the European Southern Observatory
dc.publisher.urihttps://www.aanda.org/articles/aa/full_html/2022/11/aa44186-22/aa44186-22.html
dc.relation.isPartOfAstronomy and Astrophysics
dc.rights(c) The author/s CC BY 4.0en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectgravitational lensing
dc.subjectmicro – brown dwarfs
dc.titleBrown dwarf companions in microlensing binaries detected during the 2016-2018 seasons
dc.typeJournal article
pubs.elements-id458860
pubs.organisational-groupOther
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