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OGLE-2019-BLG-1470LABc: Another microlensing giant planet in a binary system?

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cris.lastimport.scopus2024-02-12T19:37:51Z
dc.abstract.enWe report the discovery and analysis of a candidate triple-lens single-source (3L1S) microlensing event, OGLE-2019-BLG-1470. This event was first classified as a normal binary-lens single-source (2L1S) event, but a careful 2L1S modelling showed that it needs an additional lens or source to fit the observed data. It is found that the 3L1S model provides the best fit, but the binary-lens binary-source (2L2S) model is only disfavoured by Δχ<SUP>2</SUP> ≃ 18. All of the feasible models include a planet with planet-to-host mass-ratios 10<SUP>-3</SUP> ≲ q ≲ 10<SUP>-2</SUP>. A Bayesian analysis based on a Galactic model indicates that the planet is super-Jovian, and the projected host-planet separation is about 3 au. Specifically, for the best-fitting 3L1S model, the two stars have masses of $M_1=0.57^{+0.43}_{-0.32}{ m M}_{odot}$, and $M_2=0.18^{+0.15}_{-0.10}mathrm{M}_{odot}$ with projected separation of $1.3^{+0.5}_{-0.5}$ au, and the planetary mass is $M_3=2.2^{+1.8}_{-1.3}M_{ m {Jupiter}}$. For the 2L2S model, the masses of the host star and the planet are $0.55^{+0.44}_{-0.31}mathrm{M}_{odot }$ and $4.6^{+3.7}_{-2.6}M_{ m {Jupiter}}$, respectively. By investigating the properties of all known microlensing planets in binary systems, we find that all planets in binary systems published by the KMTNet survey are located inside the resonant caustics range with q ≳ 2 × 10<SUP>-3</SUP>, indicating the incompleteness of the KMTNet sample for planets in binary systems. Thus, planets in binary systems cannot be included in the current study of the KMTNet mass-ratio function, and a systematic search for planetary anomalies in KMTNet microlensing light curves of binary systems is needed.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorSkowron, Jan
dc.contributor.authorPoleski, Radosław
dc.contributor.authorSzymański, Michał
dc.contributor.authorWang, Hanyue
dc.contributor.authorLee, Dong-Joo
dc.contributor.authorIwanek, Patryk
dc.contributor.authorYang, Hongjing
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorShvartzvald, Yossi
dc.contributor.authorZhu, Wei
dc.contributor.authorHan, Cheongho
dc.contributor.authorChung, Sun-Ju
dc.contributor.authorGould, Andrew
dc.contributor.authorAlbrow, Michael D.
dc.contributor.authorPogge, Richard W.
dc.contributor.authorWrona, Marcin
dc.contributor.authorMao, Shude
dc.contributor.authorKim, Seung-Lee
dc.contributor.authorHuang, Shuo
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorRybicki, Krzysztof
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorGromadzki, Mariusz
dc.contributor.authorKim, Dong-Jin
dc.contributor.authorRyu, Yoon-Hyun
dc.contributor.authorKim, Hyoun-Woo
dc.contributor.authorHwang, Kyu-Ha
dc.contributor.authorPark, Byeong-Gon
dc.contributor.authorLee, Yongseok
dc.contributor.authorLee, Chung-Uk
dc.contributor.authorJung, Youn Kil
dc.contributor.authorCha, Sang-Mok
dc.contributor.authorMróz, Przemysław
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorYee, Jennifer C.
dc.contributor.authorKuang, Renkun
dc.contributor.authorShin, In-Gu
dc.contributor.authorSoszyński, Igor
dc.contributor.authorZang, Weicheng
dc.date.accessioned2024-01-25T15:43:27Z
dc.date.available2024-01-25T15:43:27Z
dc.date.copyright2022-09-07
dc.date.issued2022
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number2
dc.description.versionORIGINAL_AUTHOR
dc.description.volume516
dc.identifier.doi10.1093/MNRAS/STAC2315
dc.identifier.issn0035-8711
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/114537
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2022MNRAS.516.1704K
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.relation.pages1704-1720
dc.rightsOther
dc.sciencecloudnosend
dc.titleOGLE-2019-BLG-1470LABc: Another microlensing giant planet in a binary system?
dc.typeJournalArticle
dspace.entity.typePublication