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OGLE-2018-BLG-1269Lb: A Jovian Planet with a Bright I = 16 Host

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cris.lastimport.scopus2024-02-12T20:14:06Z
dc.abstract.enWe report the discovery of a planet in the microlensing event OGLE-2018-BLG-1269 with a planet-host mass ratio q ˜ 6 × 10<SUP>-4</SUP>, i.e., 0.6 times smaller than the Jupiter/Sun mass ratio. Combined with the Gaia parallax and proper motion, a strong one-dimensional constraint on the microlens parallax vector allows us to significantly reduce the uncertainties of lens physical parameters. A Bayesian analysis that ignores any information about light from the host yields that the planet is a cold giant $({M}_{2}={0.69}_{-0.22}^{+0.44}\,{M}_{{\rm{J}}})$ orbiting a Sun-like star $({M}_{1}={1.13}_{-0.35}^{+0.72}\,{M}_{\odot })$ at a distance of ${D}_{{\rm{L}}}={2.56}_{-0.62}^{+0.92}\,\mathrm{kpc}$ . The projected planet-host separation is ${a}_{\perp }={4.61}_{-1.17}^{+1.70}\,\mathrm{au}$ . Using Gaia astrometry, we show that the blended light lies $\lesssim 12\,\mathrm{mas}$ from the host and therefore must be either the host star or a stellar companion to the host. An isochrone analysis favors the former possibility at >99.6%. The host is therefore a subgiant. For host metallicities in the range of $0.0\leqslant [\mathrm{Fe}/{\rm{H}}]\leqslant +0.3$ , the host and planet masses are then in the range of $1.16\leqslant {M}_{1}/{M}_{\odot }\leqslant 1.38$ and $0.74\leqslant {M}_{2}/{M}_{{\rm{J}}}\leqslant 0.89$ , respectively. Low host metallicities are excluded. The brightness and proximity of the lens make the event a strong candidate for spectroscopic follow-up both to test the microlensing solution and to further characterize the system.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorJung, Youn Kil
dc.contributor.authorGould, Andrew
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorSumi, Takahiro
dc.contributor.authorYee, Jennifer C.
dc.contributor.authorHan, Cheongho
dc.contributor.authorAlbrow, Michael D.
dc.contributor.authorChung, Sun-Ju
dc.contributor.authorHwang, Kyu-Ha
dc.contributor.authorRyu, Yoon-Hyun
dc.contributor.authorShin, In-Gu
dc.contributor.authorShvartzvald, Yossi
dc.contributor.authorZhu, Wei
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.authorLee, Chung-Uk
dc.contributor.authorLee, Dong-Joo
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.authorBond, Ian A.
dc.contributor.authorBhattacharya, Aparna
dc.contributor.authorDonachie, Martin
dc.contributor.authorFukui, Akihiko
dc.contributor.authorHirao, Yuki
dc.contributor.authorItow, Yoshitaka
dc.contributor.authorKondo, Iona
dc.contributor.authorKoshimoto, Naoki
dc.contributor.authorLi, Man Cheung Alex
dc.contributor.authorMatsubara, Yutaka
dc.contributor.authorMiyazaki, Shota
dc.contributor.authorMuraki, Yasushi
dc.contributor.authorNagakane, Masayuki
dc.contributor.authorRanc, Clément
dc.contributor.authorRattenbury, Nicholas J.
dc.contributor.authorSuematsu, Haruno
dc.contributor.authorSullivan, Denis J.
dc.contributor.authorSuzuki, Daisuke
dc.contributor.authorTristram, Paul J.
dc.contributor.authorYonehara, Atsunori
dc.date.accessioned2024-01-25T15:42:48Z
dc.date.available2024-01-25T15:42:48Z
dc.date.copyright2020-06-29
dc.date.issued2020
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number3
dc.description.versionORIGINAL_AUTHOR
dc.description.volume160
dc.identifier.doi10.3847/1538-3881/ABACC8
dc.identifier.issn0004-6256
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/114529
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2020AJ....160..148J
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstronomical Journal
dc.relation.pages148
dc.rightsOther
dc.sciencecloudnosend
dc.titleOGLE-2018-BLG-1269Lb: A Jovian Planet with a Bright I = 16 Host
dc.typeJournalArticle
dspace.entity.typePublication