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OGLE-2014-BLG-0319: A Sub-Jupiter-mass Planetary Event Encountered Degeneracy with Different Mass Ratios and Lens-source Relative Proper Motions

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dc.abstract.enWe report the discovery of a sub-Jovian-mass planet, OGLE-2014-BLG-0319Lb. The characteristics of this planet will be added into a future extended statistical analysis of the Microlensing Observations in Astrophysics (MOA) collaboration. The planetary anomaly of the light curve is characterized by MOA and OGLE survey observations and results in three degenerate models with different planetary-mass ratios of q = (10.3, 6.6, 4.5) × 10<SUP>-4</SUP>. We find that the last two models require unreasonably small lens-source relative proper motions of μ <SUB>rel</SUB> ~ 1 mas yr<SUP>-1</SUP>. Considering Galactic prior probabilities, we rule out these two models from the final result. We conduct a Bayesian analysis to estimate physical properties of the lens system using a Galactic model and find that the lens system is composed of a ${0.49}_{-0.27}^{+0.35} {M}_{mathrm{Jup}}$ sub-Jovian planet orbiting a ${0.47}_{-0.25}^{+0.33} {M}_{odot }$ M dwarf near the Galactic Bulge. This analysis demonstrates that Galactic priors are useful to resolve this type of model degeneracy. This is important for estimating the mass-ratio function statistically. However, this method would be unlikely successful in shorter timescale events, which are mostly due to low-mass objects, like brown dwarfs or free-floating planets. Therefore, careful treatment is needed for estimating the mass-ratio function of the companions around such low-mass hosts, which only the microlensing can probe.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorYama, Hibiki
dc.contributor.authorWyrzykowski, Łukasz
dc.contributor.authorItow, Yoshitaka
dc.contributor.authorPoleski, Radosław
dc.contributor.authorSkowron, Jan
dc.contributor.authorFujii, Hirosane
dc.contributor.authorKondo, Iona
dc.contributor.authorSzymański, Michał
dc.contributor.authorHirao, Yuki
dc.contributor.authorCheongho, Han
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorRattenbury, Nicholas
dc.contributor.authorSatoh, Yuki K.
dc.contributor.authorSuzuki, Daisuke
dc.contributor.authorMiyazaki, Shota
dc.contributor.authorTristram, Paul J.
dc.contributor.authorSumi, Takahiro
dc.contributor.authorKoshimoto, Naoki
dc.contributor.authorBennett, David P.
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorBond, Ian A.
dc.contributor.authorMuraki, Yasushi
dc.contributor.authorBhattacharya, Aparna
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorYonehara, Atsunori
dc.contributor.authorFukui, Akihiko
dc.contributor.authorSilva, Stela Ishitani
dc.contributor.authorOlmschenk, Greg
dc.contributor.authorKirikawa, Rintaro
dc.contributor.authorAbe, Fumio
dc.contributor.authorMatsubara, Yutaka
dc.contributor.authorBarry, Richard K.
dc.contributor.authorOkamura, Arisa
dc.contributor.authorMunford, Brandon
dc.contributor.authorRanc, Clément
dc.contributor.authorMróz, Przemysław
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorToda, Taiga
dc.contributor.authorMatsumoto, Sho
dc.contributor.authorSoszyński, Igor
dc.date.accessioned2024-01-25T15:16:35Z
dc.date.available2024-01-25T15:16:35Z
dc.date.copyright2022-02-10
dc.date.issued2022
dc.description.accesstimeAT_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number3
dc.description.versionFINAL_PUBLISHED
dc.description.volume163
dc.identifier.doi10.3847/1538-3881/AC4960
dc.identifier.issn0004-6256
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/114484
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2022AJ....163..123M
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstronomical Journal
dc.relation.pages123
dc.rightsCC-BY
dc.sciencecloudnosend
dc.titleOGLE-2014-BLG-0319: A Sub-Jupiter-mass Planetary Event Encountered Degeneracy with Different Mass Ratios and Lens-source Relative Proper Motions
dc.typeJournalArticle
dspace.entity.typePublication