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Wide-Orbit Exoplanets are Common. Analysis of Nearly 20 Years of OGLE Microlensing Survey Data

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cris.lastimport.scopus2024-02-12T19:55:13Z
dc.abstract.enWe use nearly 20 yr of photometry obtained by the OGLE survey to measure the occurrence rate of wide-orbit (or ice giant) microlensing planets, i.e., with separations from ≍5 a.u. to ≍15 a.u. and mass-ratios from 10<SUP>-4</SUP> to 0.033. In a sample of 3112 events we find six previously known wide-orbit planets and a new microlensing planet or brown dwarf OGLE-2017-BLG-0114Lb, for which close and wide orbits are possible and close orbit is preferred. We run extensive simulations of the planet detection efficiency, robustly taking into account the finite-source effects. We find that the extrapolation of the previously measured rate of microlensing planets significantly under-predicts the number of wide-orbit planets. On average, every microlensing star hosts 1.4<SUP>+0.9</SUP>_<SUB>-0.6</SUB> ice giant planets.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorPoleski, Radosław
dc.contributor.authorSkowron, Jan
dc.contributor.authorMróz, Przemysław
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorSzymański, Michał
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorRybicki, Krzysztof
dc.contributor.authorIwanek, Patryk
dc.contributor.authorWrona, Marcin
dc.contributor.authorGromadzki, Mariusz
dc.date.accessioned2024-01-23T07:21:05Z
dc.date.available2024-01-23T07:21:05Z
dc.date.copyright2021-04-05
dc.date.issued2021
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number1
dc.description.versionORIGINAL_AUTHOR
dc.description.volume71
dc.identifier.doi10.32023/0001-5237/71.1.1
dc.identifier.issn0001-5237
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/125042
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2021AcA....71....1P
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofActa Astronomica
dc.relation.pages1-23
dc.rightsOther
dc.sciencecloudnosend
dc.titleWide-Orbit Exoplanets are Common. Analysis of Nearly 20 Years of OGLE Microlensing Survey Data
dc.typeJournalArticle
dspace.entity.typePublication