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Spitzer Microlensing of MOA-2016-BLG-231L: A Counter-rotating Brown Dwarf Binary in the Galactic Disk

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cris.lastimport.scopus2024-02-12T20:00:17Z
dc.abstract.enWe analyze the binary microlensing event MOA-2016-BLG-231, which was observed from the ground and from Spitzer. The lens is composed of very-low-mass brown dwarfs (BDs) with {M}<SUB>1</SUB>={21}<SUB>-5</SUB><SUP>+12</SUP> {M}<SUB>J</SUB> and {M}<SUB>2</SUB>={9}<SUB>-2</SUB><SUP>+5</SUP> {M}<SUB>J</SUB>, and it is located in the Galactic disk {D}<SUB>{{L</SUB>}}={2.85}<SUB>-0.50</SUB><SUP>+0.88</SUP> {kpc}. This is the fifth binary brown dwarf discovered by microlensing, and the BD binary is moving counter to the orbital motion of disk stars. Constraints on the lens physical properties come from late-time, non-caustic-crossing features of the Spitzer light curve. Thus, MOA-2016-BLG-231 shows how Spitzer plays a crucial role in resolving the nature of BDs in binary BD events with short timescales (≲10 days).
dc.affiliationUniwersytet Warszawski
dc.contributor.authorSkowron, Jan
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorSzymański, Michał
dc.contributor.authorSoszyński, Igor
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorChung, Sun-Ju
dc.contributor.authorGould, Andrew
dc.contributor.authorBond, Ian A.
dc.contributor.authorZhu, Wei
dc.contributor.authorAlbrow, Michael D.
dc.contributor.authorJung, Youn Kil
dc.contributor.authorHan, Cheongho
dc.contributor.authorHwang, Kyu-Ha
dc.contributor.authorRyu, Yoon-Hyun
dc.contributor.authorShin, In-Gu
dc.contributor.authorShvartzvald, Yossi
dc.contributor.authorYee, Jennifer C.
dc.contributor.authorZang, Weicheng
dc.contributor.authorCha, Sang-Mok
dc.contributor.authorKim, Dong-Jin
dc.contributor.authorKim, Hyoun-Woo
dc.contributor.authorKim, Seung-Lee
dc.contributor.authorKim, Yun-Hak
dc.contributor.authorLee, Chung-Uk
dc.contributor.authorLee, Dong-Joo
dc.contributor.authorLee, Yongseok
dc.contributor.authorPark, Byeong-Gon
dc.contributor.authorPogge, Richard W.
dc.contributor.authorPoleski, Radosław
dc.contributor.authorMróz, Przemysław
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorPawlak, Michał
dc.contributor.authorBeichman, Charles A.
dc.contributor.authorBryden, Geoffery
dc.contributor.authorNovati, Sebastiano Calchi
dc.contributor.authorCarey, Sean
dc.contributor.authorGaudi, B. Scott
dc.contributor.authorHenderson, Calen B.
dc.contributor.authorAbe, Fumio
dc.contributor.authorBarry, Richard
dc.contributor.authorBennett, David P.
dc.contributor.authorBhattacharya, Aparna
dc.contributor.authorDonachie, Martin
dc.contributor.authorFukui, Akihiko
dc.contributor.authorHirao, Yuki
dc.contributor.authorItow, Yoshitaka
dc.contributor.authorKawasaki, Kohei
dc.contributor.authorKondo, Iona
dc.contributor.authorKoshimoto, Naoki
dc.contributor.authorLi, Man Cheung Alex
dc.contributor.authorMatsubara, Yutaka
dc.contributor.authorMuraki, Yasushi
dc.contributor.authorMiyazaki, Shota
dc.contributor.authorNagakane, Masayuki
dc.contributor.authorRanc, Clément
dc.contributor.authorRattenbury, Nicholas J.
dc.contributor.authorSuematsu, Haruno
dc.contributor.authorSullivan, Denis J.
dc.contributor.authorSumi, Takahiro
dc.contributor.authorSuzuki, Daisuke
dc.contributor.authorTristram, Paul J.
dc.contributor.authorYonehara, Atsunori
dc.date.accessioned2024-01-26T07:57:11Z
dc.date.available2024-01-26T07:57:11Z
dc.date.copyright2019-02-08
dc.date.issued2019
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number2
dc.description.versionORIGINAL_AUTHOR
dc.description.volume871
dc.identifier.doi10.3847/1538-4357/AAF861
dc.identifier.issn0004-637X
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/120398
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2019ApJ...871..179C
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstrophysical Journal
dc.relation.pages179
dc.rightsOther
dc.sciencecloudnosend
dc.titleSpitzer Microlensing of MOA-2016-BLG-231L: A Counter-rotating Brown Dwarf Binary in the Galactic Disk
dc.typeJournalArticle
dspace.entity.typePublication