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dc.contributor.authorShvartzvald, Yossi
dc.contributor.authorYee, Jennifer C.
dc.contributor.authorSkowron, Jan
dc.contributor.authorLee, Chung-Uk
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorCalchi Novati, Sebastiano
dc.contributor.authorBozza, Valerio
dc.contributor.authorBeichman, Charles A.
dc.contributor.authorBryden, Geoffery
dc.contributor.authorCarey, Sean
dc.contributor.authorGaudi, B. Scott
dc.contributor.authorHenderson, Calen B.
dc.contributor.authorZhu, Wei
dc.contributor.authorBachelet, Etienne
dc.contributor.authorBolt, Greg
dc.contributor.authorChristie, Grant
dc.contributor.authorMaoz, Dan
dc.contributor.authorNatusch, Tim
dc.contributor.authorPogge, Richard W.
dc.contributor.authorStreet, Rachel A.
dc.contributor.authorTan, Thiam-Guan
dc.contributor.authorTsapras, Yiannis
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorSoszyński, Igor
dc.contributor.authorSzymański, Michał K.
dc.contributor.authorMróz, Przemek
dc.contributor.authorPoleski, Radoslaw
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorPawlak, Michał
dc.contributor.authorRybicki, Krzysztof A.
dc.contributor.authorIwanek, Patryk
dc.contributor.authorAlbrow, Michael D.
dc.contributor.authorCha, Sang-Mok
dc.contributor.authorChung, Sun-Ju
dc.contributor.authorGould, Andrew
dc.contributor.authorHan, Cheongho
dc.contributor.authorHwang, Kyu-Ha
dc.contributor.authorJung, Youn Kil
dc.contributor.authorKim, Dong-Jin
dc.contributor.authorKim, Hyoun-Woo
dc.contributor.authorKim, Seung-Lee
dc.contributor.authorLee, Dong-Joo
dc.contributor.authorLee, Yongseok
dc.contributor.authorPark, Byeong-Gon
dc.contributor.authorRyu, Yoon-Hyun
dc.contributor.authorShin, In-Gu
dc.contributor.authorZang, Weicheng
dc.contributor.authorDominik, Martin
dc.contributor.authorHelling, Christiane
dc.contributor.authorHundertmark, Markus
dc.contributor.authorJørgensen, Uffe G.
dc.contributor.authorLonga-Peña, Penelope
dc.contributor.authorLowry, Stephen
dc.contributor.authorSajadian, Sedighe
dc.contributor.authorBurgdorf, Martin J.
dc.contributor.authorCampbell-White, Justyn
dc.contributor.authorCiceri, Simona
dc.contributor.authorEvans, Daniel F.
dc.contributor.authorFujii, Yuri I.
dc.contributor.authorHinse, Tobias C.
dc.contributor.authorRahvar, Sohrab
dc.contributor.authorRabus, Markus
dc.contributor.authorSkottfelt, Jesper
dc.contributor.authorSnodgrass, Colin
dc.contributor.authorSouthworth, John
dc.date.accessioned2019-02-20T10:30:04Z
dc.date.available2019-02-20T10:30:04Z
dc.date.issued2019-02-11
dc.identifier.citationShvartzvald , Y , Yee , J C , Skowron , J , Lee , C-U , Udalski , A , Calchi Novati , S , Bozza , V , Beichman , C A , Bryden , G , Carey , S , Gaudi , B S , Henderson , C B , Zhu , W , Bachelet , E , Bolt , G , Christie , G , Maoz , D , Natusch , T , Pogge , R W , Street , R A , Tan , T-G , Tsapras , Y , Pietrukowicz , P , Soszyński , I , Szymański , M K , Mróz , P , Poleski , R , Kozłowski , S , Ulaczyk , K , Pawlak , M , Rybicki , K A , Iwanek , P , Albrow , M D , Cha , S-M , Chung , S-J , Gould , A , Han , C , Hwang , K-H , Jung , Y K , Kim , D-J , Kim , H-W , Kim , S-L , Lee , D-J , Lee , Y , Park , B-G , Ryu , Y-H , Shin , I-G , Zang , W , Dominik , M , Helling , C , Hundertmark , M , Jørgensen , U G , Longa-Peña , P , Lowry , S , Sajadian , S , Burgdorf , M J , Campbell-White , J , Ciceri , S , Evans , D F , Fujii , Y I , Hinse , T C , Rahvar , S , Rabus , M , Skottfelt , J , Snodgrass , C & Southworth , J 2019 , ' Spitzer microlensing parallax for OGLE-2017-BLG-0896 reveals a counter-rotating low-mass brown dwarf ' , Astronomical Journal , vol. 157 , no. 3 , 106 , pp. 1-8 . https://doi.org/10.3847/1538-3881/aafe12en
dc.identifier.issn0004-6256
dc.identifier.otherPURE: 255411605
dc.identifier.otherPURE UUID: 38b4a694-4fe6-42ce-8eff-170fb720cbbf
dc.identifier.otherBibCode: 2018arXiv180508778S
dc.identifier.otherScopus: 85063482475
dc.identifier.otherWOS: 000458377400001
dc.identifier.urihttp://hdl.handle.net/10023/17099
dc.description.abstractThe kinematics of isolated brown dwarfs in the Galaxy, beyond the solar neighborhood, is virtually unknown. Microlensing has the potential to probe this hidden population, as it can measure both the mass and five of the six phase-space coordinates (all except the radial velocity) even of a dark isolated lens. However, the measurements of both the microlens-parallax and finite-source effects are needed in order to recover the full information. Here, we combine the Spitzer satellite parallax measurement with the ground-based light curve, which exhibits strong finite-source effects, of event OGLE-2017-BLG-0896. We find two degenerate solutions for the lens (due to the known satellite-parallax degeneracy), which are consistent with each other except for their proper motion. The lens is an isolated brown dwarf with a mass of either 18 ± 1 M J or 20 ± 1 M J . This is the lowest isolated-object mass measurement to date, only ~45% more massive than the theoretical deuterium-fusion boundary at solar metallicity, which is the common definition of a free-floating planet. The brown dwarf is located at either 3.9 ± 0.1 kpc or 4.1 ± 0.1 kpc toward the Galactic bulge, but with proper motion in the opposite direction of disk stars, with one solution suggesting it is moving within the Galactic plane. While it is possibly a halo brown dwarf, it might also represent a different, unknown population.
dc.format.extent8
dc.language.isoeng
dc.relation.ispartofAstronomical Journalen
dc.rights© 2019, American Astronomical Society. This work has been made available online in accordance with the publisher's policies. This is the final published version of the work, which was originally published at https://doi.org/10.3847/1538-3881/aafe12en
dc.subjectGalaxy: bulgeen
dc.subjectGravitational lensing: microen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subject3rd-DASen
dc.subjectBDCen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleSpitzer microlensing parallax for OGLE-2017-BLG-0896 reveals a counter-rotating low-mass brown dwarfen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews.St Andrews Centre for Exoplanet Scienceen
dc.identifier.doihttps://doi.org/10.3847/1538-3881/aafe12
dc.description.statusPeer revieweden
dc.identifier.urlhttp://adsabs.harvard.edu/abs/2018arXiv180508778Sen


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