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

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dc.abstract.enAims: 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 P<SUB>BD</SUB> > 80%. For MOA-2017-BLG-477 and KMT-2018-BLG-0357, the probabilities are relatively low with P<SUB>BD</SUB> = 61% and 69%, respectively.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorHan, Cheongho
dc.contributor.authorRyu, Yoon-Hyun
dc.contributor.authorShin, In-Gu
dc.contributor.authorJung, Youn Kil
dc.contributor.authorKim, Doeon
dc.contributor.authorHirao, Yuki
dc.contributor.authorBozza, Valerio
dc.contributor.authorAlbrow, Michael D.
dc.contributor.authorZang, Weicheng
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorBond, Ian A.
dc.contributor.authorChung, Sun-Ju
dc.contributor.authorGould, Andrew
dc.contributor.authorHwang, Kyu-Ha
dc.contributor.authorShvartzvald, Yossi
dc.contributor.authorYang, Hongjing
dc.contributor.authorCha, Sang-Mok
dc.contributor.authorKim, Dong-Jin
dc.contributor.authorKim, Hyoun-Woo
dc.contributor.authorKim, Seung-Lee
dc.contributor.authorLee, Chung-Uk
dc.contributor.authorLee, Dong-Joo
dc.contributor.authorYee, Jennifer C.
dc.contributor.authorLee, Yongseok
dc.contributor.authorPark, Byeong-Gon
dc.contributor.authorPogge, Richard W.
dc.contributor.authorMróz, Przemysław
dc.contributor.authorSzymański, Michał
dc.contributor.authorSkowron, Jan
dc.contributor.authorPoleski, Radosław
dc.contributor.authorSoszyński, Igor
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorRybicki, Krzysztof
dc.contributor.authorIwanek, Patryk
dc.contributor.authorWrona, Marcin
dc.contributor.authorAbe, Fumio
dc.contributor.authorBarry, Richard
dc.contributor.authorBennett, David P.
dc.contributor.authorBhattacharya, Aparna
dc.contributor.authorFujii, Hirosame
dc.contributor.authorFukui, Akihiko
dc.contributor.authorSilva, Stela Ishitani
dc.contributor.authorKirikawa, Rintaro
dc.contributor.authorKondo, Iona
dc.contributor.authorKoshimoto, Naoki
dc.contributor.authorMatsubara, Yutaka
dc.contributor.authorMatsumoto, Sho
dc.contributor.authorMiyazaki, Shota
dc.contributor.authorMuraki, Yasushi
dc.contributor.authorOkamura, Arisa
dc.contributor.authorOlmschenk, Greg
dc.contributor.authorRanc, Clément
dc.contributor.authorRattenbury, Nicholas J.
dc.contributor.authorSatoh, Yuki
dc.contributor.authorSumi, Takahiro
dc.contributor.authorSuzuki, Daisuke
dc.contributor.authorToda, Taiga
dc.contributor.authorTristram, Paul J.
dc.contributor.authorVandorou, Aikaterini
dc.contributor.authorYama, Hibiki
dc.contributor.authorItow, Yoshitaka
dc.date.accessioned2024-01-24T18:57:08Z
dc.date.available2024-01-24T18:57:08Z
dc.date.copyright2022-11-08
dc.date.issued2022
dc.description.accesstimeAT_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.versionFINAL_PUBLISHED
dc.description.volume667
dc.identifier.doi10.1051/0004-6361/202244186
dc.identifier.issn0004-6361
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/102570
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2022A&A...667A..64H
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstronomy and Astrophysics
dc.relation.pagesA64
dc.rightsCC-BY
dc.sciencecloudnosend
dc.titleBrown dwarf companions in microlensing binaries detected during the 2016-2018 seasons
dc.typeJournalArticle
dspace.entity.typePublication