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New giant planet beyond the snow line for an extended MOA exoplanet microlens sample

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cris.lastimport.scopus2024-02-12T20:19:17Z
dc.abstract.enCharacterizing a planet detected by microlensing is hard if the planetary signal is weak or the lens-source relative trajectory is far from caustics. However, statistical analyses of planet demography must include those planets to accurately determine occurrence rates. As part of a systematic modelling effort in the context of a >10-yr retrospective analysis of MOA's survey observations to build an extended MOA statistical sample, we analyse the light curve of the planetary microlensing event MOA-2014-BLG-472. This event provides weak constraints on the physical parameters of the lens, as a result of a planetary anomaly occurring at low magnification in the light curve. We use a Bayesian analysis to estimate the properties of the planet, based on a refined Galactic model and the assumption that all Milky Way's stars have an equal planet-hosting probability. We find that a lens consisting of a $1.9^{+2.2}_{-1.2}\, \mathrm{M}_\mathrm{J}$ giant planet orbiting a $0.31^{+0.36}_{-0.19}\, \mathrm{M}_\odot$ host at a projected separation of $0.75\pm 0.24\, \mathrm{au}$ is consistent with the observations and is most likely, based on the Galactic priors. The lens most probably lies in the Galactic bulge, at $7.2^{+0.6}_{-1.7}\,\mathrm{kpc}$ from Earth. The accurate measurement of the measured planet-to-host star mass ratio will be included in the next statistical analysis of cold planet demography detected by microlensing.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorRanc, Clément
dc.contributor.authorBennett, David P.
dc.contributor.authorBarry, Richard K.
dc.contributor.authorKoshimoto, Naoki
dc.contributor.authorSkowron, Jan
dc.contributor.authorHirao, Yuki
dc.contributor.authorBond, Ian A.
dc.contributor.authorSumi, Takahiro
dc.contributor.authorBathe-Peters, Lars
dc.contributor.authorAbe, Fumio
dc.contributor.authorBhattacharya, Aparna
dc.contributor.authorDonachie, Martin
dc.contributor.authorFujii, Hirosane
dc.contributor.authorFukui, Akihiko
dc.contributor.authorSilva, Stela Ishitani
dc.contributor.authorItow, Yoshitaka
dc.contributor.authorKirikawa, Rintaro
dc.contributor.authorKondo, Iona
dc.contributor.authorLi, Man Cheung Alex
dc.contributor.authorMatsubara, Yutaka
dc.contributor.authorMuraki, Yasushi
dc.contributor.authorMiyazaki, Shota
dc.contributor.authorOlmschenk, Greg
dc.contributor.authorRattenbury, Nicholas J.
dc.contributor.authorSatoh, Yuki
dc.contributor.authorShoji, Hikaru
dc.contributor.authorSuzuki, Daisuke
dc.contributor.authorTanaka, Yuzuru
dc.contributor.authorTristram, Paul J.
dc.contributor.authorYamawaki, Tsubasa
dc.contributor.authorYonehara, Atsunori
dc.date.accessioned2024-01-25T13:48:01Z
dc.date.available2024-01-25T13:48:01Z
dc.date.copyright2021-07-07
dc.date.issued2021
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number1
dc.description.versionORIGINAL_AUTHOR
dc.description.volume506
dc.identifier.doi10.1093/MNRAS/STAB1787
dc.identifier.issn0035-8711
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/113579
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2021MNRAS.506.1498R
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.relation.pages1498-1506
dc.rightsOther
dc.sciencecloudnosend
dc.titleNew giant planet beyond the snow line for an extended MOA exoplanet microlens sample
dc.typeJournalArticle
dspace.entity.typePublication