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Systematic Korea Microlensing Telescope Network planetary anomaly search - III. One wide-orbit planet and two stellar binaries

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cris.lastimport.scopus2024-02-12T19:49:30Z
dc.abstract.enOnly a few wide-orbit planets around old stars have been detected, which limits our statistical understanding of this planet population. Following the systematic search for planetary anomalies in microlensing events found by the Korea Microlensing Telescope Network, we present the discovery and analysis of three events that were initially thought to contain wide-orbit planets. The anomalous feature in the light curve of OGLE-2018-BLG-0383 is caused by a planet with mass ratio q = 2.1 × 10<SUP>-4</SUP> and a projected separation s = 2.45. This makes it the lowest mass-ratio microlensing planet at such wide orbits. The other two events, KMT-2018-BLG-0998 and OGLE-2018-BLG-0271, are shown to be stellar binaries (q > 0.1) with rather close (s < 1) separations. We briefly discuss the properties of known wide-orbit microlensing planets and show that the survey observations are crucial in discovering and further statistically constraining such a planet population.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorShin, In-Gu
dc.contributor.authorShvartzvald, Yossi
dc.contributor.authorPogge, Richard W.
dc.contributor.authorPoleski, Radosław
dc.contributor.authorSkowron, Jan
dc.contributor.authorMao, Shude
dc.contributor.authorSzymański, Michał
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorKim, Hyoun-Woo
dc.contributor.authorRyu, Yoon-Hyun
dc.contributor.authorWang, Hanyue
dc.contributor.authorZang, Weicheng
dc.contributor.authorRybicki, Krzysztof
dc.contributor.authorKim, Dong-Jin
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorKim, Seung-Lee
dc.contributor.authorLee, Yongseok
dc.contributor.authorZhang, Xiangyu
dc.contributor.authorZhu, Wei
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorHwang, Kyu-Ha
dc.contributor.authorGould, Andrew
dc.contributor.authorGromadzki, Mariusz
dc.contributor.authorPark, Byeong-Gon
dc.contributor.authorWrona, Marcin
dc.contributor.authorAlbrow, Michael D.
dc.contributor.authorChung, Sun-Ju
dc.contributor.authorHan, Cheongho
dc.contributor.authorLee, Dong-Joo
dc.contributor.authorIwanek, Patryk
dc.contributor.authorKim, Doeon
dc.contributor.authorCha, Sang-Mok
dc.contributor.authorJung, Youn Kil
dc.contributor.authorMróz, Przemysław
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorYee, Jennifer C.
dc.contributor.authorSoszyński, Igor
dc.contributor.authorLee, Chung-Uk
dc.contributor.authorYang, Hongjing
dc.date.accessioned2024-01-26T09:28:04Z
dc.date.available2024-01-26T09:28:04Z
dc.date.copyright2021-12-04
dc.date.issued2022
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number2
dc.description.versionORIGINAL_AUTHOR
dc.description.volume510
dc.identifier.doi10.1093/MNRAS/STAB3581
dc.identifier.issn0035-8711
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/121353
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2022MNRAS.510.1778W
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.relation.pages1778-1790
dc.rightsOther
dc.sciencecloudnosend
dc.titleSystematic Korea Microlensing Telescope Network planetary anomaly search - III. One wide-orbit planet and two stellar binaries
dc.typeJournalArticle
dspace.entity.typePublication