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Spitzer Opens New Path to Break Classic Degeneracy for Jupiter-mass Microlensing Planet OGLE-2017-BLG-1140Lb

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cris.lastimport.scopus2024-02-12T20:14:07Z
dc.abstract.enWe analyze the combined Spitzer and ground-based data for OGLE-2017-BLG-1140 and show that the event was generated by a Jupiter-class ({m}<SUB>p</SUB>≃ 1.6 {M}<SUB>{{J</SUB>}{{u}}{{p}}}) planet orbiting a mid-late M dwarf (M≃ 0.2 {M}<SUB>⊙ </SUB>) that lies {D}<SUB>LS</SUB>}≃ 1.0 {kpc} in the foreground of the microlensed Galactic-bar source star. The planet-host projected separation is {a}<SUB>\perp </SUB>≃ 1.0 {au}, i.e., well beyond the snow line. By measuring the source proper motion {{\boldsymbol{μ }}}<SUB>s</SUB> from ongoing long-term OGLE imaging and combining this with the lens-source relative proper motion {{\boldsymbol{μ }}}<SUB>rel</SUB>} derived from the microlensing solution, we show that the lens proper motion {{\boldsymbol{μ }}}<SUB>l</SUB>={{\boldsymbol{μ }}}<SUB>rel</SUB>}+{{\boldsymbol{μ }}}<SUB>s</SUB> is consistent with the lens lying in the Galactic disk, although a bulge lens is not ruled out. We show that while the Spitzer and ground-based data are comparably well fitted by planetary (i.e., binary-lens (2L1S)) and binary-source (1L2S) models, the combination of Spitzer and ground-based data decisively favors the planetary model. This is a new channel to resolve the 2L1S/1L2S degeneracy, which can be difficult to break in some cases.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorNovati, S. Calchi
dc.contributor.authorSkowron, Jan
dc.contributor.authorJung, Y. K.
dc.contributor.authorBeichman, C.
dc.contributor.authorBryden, G.
dc.contributor.authorCarey, S.
dc.contributor.authorGaudi, B. S.
dc.contributor.authorHenderson, C. B.
dc.contributor.authorShvartzvald, Y.
dc.contributor.authorYee, J. C.
dc.contributor.authorZhu, W.
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorSzymański, Michał
dc.contributor.authorMróz, Przemysław
dc.contributor.authorPoleski, Radosław
dc.contributor.authorSoszyński, Igor
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorPawlak, Michał
dc.contributor.authorRybicki, Krzysztof
dc.contributor.authorIwanek, Patryk
dc.contributor.authorAlbrow, M. D.
dc.contributor.authorChung, S. -J.
dc.contributor.authorGould, A.
dc.contributor.authorHan, C.
dc.contributor.authorHwang, K. -H.
dc.contributor.authorRyu, Y. -H.
dc.contributor.authorShin, I. -G.
dc.contributor.authorZang, W.
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.authorLee, Y.
dc.contributor.authorPark, B. -G.
dc.contributor.authorPogge, R. W.
dc.date.accessioned2024-01-26T07:57:38Z
dc.date.available2024-01-26T07:57:38Z
dc.date.copyright2018-03-12
dc.date.issued2018
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number6
dc.description.versionORIGINAL_AUTHOR
dc.description.volume155
dc.identifier.doi10.3847/1538-3881/AAC21C
dc.identifier.issn0004-6256
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/120402
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2018AJ....155..261C
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstronomical Journal
dc.relation.pages261
dc.rightsOther
dc.sciencecloudnosend
dc.titleSpitzer Opens New Path to Break Classic Degeneracy for Jupiter-mass Microlensing Planet OGLE-2017-BLG-1140Lb
dc.typeJournalArticle
dspace.entity.typePublication