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A companion on the planet/brown dwarf mass boundary on a wide orbit discovered by gravitational microlensing

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dc.abstract.enWe present the discovery of a substellar companion to the primary host lens in the microlensing event <ASTROBJ>MOA-2012-BLG-006</ASTROBJ>. The companion-to-host mass ratio is 0.016, corresponding to a companion mass of ≈8 M<SUB>Jup</SUB>(M<SUB>∗</SUB>/ 0.5 M<SUB>⊙</SUB>). Thus, the companion is either a high-mass giant planet or a low-mass brown dwarf, depending on the mass of the primary M<SUB>∗</SUB>. The companion signal was separated from the peak of the primary event by a time that was as much as four times longer than the event timescale. We therefore infer a relatively large projected separation of the companion from its host of ≈10 au(M<SUB>∗</SUB>/ 0.5 M<SUB>⊙</SUB>)<SUP>1 / 2</SUP> for a wide range (3-7 kpc) of host star distances from the Earth. We also challenge a previous claim of a planetary companion to the lens star in microlensing event OGLE-2002-BLG-045.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorPoleski, Radosław
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorBond, I. A.
dc.contributor.authorBeaulieu, J. P.
dc.contributor.authorClanton, C.
dc.contributor.authorGaudi, S.
dc.contributor.authorSzymański, Michał
dc.contributor.authorSoszyński, Igor
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorSkowron, Jan
dc.contributor.authorWyrzykowski, Łukasz
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorBennett, D. P.
dc.contributor.authorSumi, T.
dc.contributor.authorSuzuki, D.
dc.contributor.authorRattenbury, N. J.
dc.contributor.authorKoshimoto, N.
dc.contributor.authorAbe, F.
dc.contributor.authorAsakura, Y.
dc.contributor.authorBarry, R. K.
dc.contributor.authorBhattacharya, A.
dc.contributor.authorDonachie, M.
dc.contributor.authorEvans, P.
dc.contributor.authorFukui, A.
dc.contributor.authorHirao, Y.
dc.contributor.authorItow, Y.
dc.contributor.authorLi, M. C. A.
dc.contributor.authorLing, C. H.
dc.contributor.authorMasuda, K.
dc.contributor.authorMatsubara, Y.
dc.contributor.authorMuraki, Y.
dc.contributor.authorNagakane, M.
dc.contributor.authorOhnishi, K.
dc.contributor.authorRanc, C.
dc.contributor.authorSaito, To.
dc.contributor.authorSharan, A.
dc.contributor.authorSullivan, D. J.
dc.contributor.authorTristram, P. J.
dc.contributor.authorYamada, T.
dc.contributor.authorYonehara, A.
dc.contributor.authorBatista, V.
dc.contributor.authorMarquette, J. B.
dc.date.accessioned2024-01-24T17:18:05Z
dc.date.available2024-01-24T17:18:05Z
dc.date.copyright2017-04-04
dc.date.issued2017
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.versionORIGINAL_AUTHOR
dc.description.volume604
dc.identifier.doi10.1051/0004-6361/201730928
dc.identifier.issn0004-6361
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/101467
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2017A&A...604A.103P
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstronomy and Astrophysics
dc.relation.pagesA103
dc.rightsOther
dc.sciencecloudnosend
dc.titleA companion on the planet/brown dwarf mass boundary on a wide orbit discovered by gravitational microlensing
dc.typeJournalArticle
dspace.entity.typePublication