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OGLE-2015-BLG-1459L: The Challenges of Exo-moon Microlensing

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dc.abstract.enWe show that dense OGLE and KMTNet I-band survey data require four bodies (sources plus lenses) to explain the microlensing light curve of OGLE-2015-BLG-1459. However, these can equally well consist of three lenses and one source (3L1S), two lenses and two sources (2L2S), or one lens and three sources (1L3S). In the 3L1S and 2L2S interpretations, the host is a brown dwarf and the dominant companion is a Neptune-class planet, with the third body (in the 3L1S case) being a Mars-class object that could have been a moon of the planet. In the 1L3S solution, the light curve anomalies are explained by a tight (five stellar radii) low-luminosity binary source that is offset from the principal source of the event by ˜ 0.17 {au}. These degeneracies are resolved in favor of the 1L3S solution by color effects derived from comparison to MOA data, which are taken in a slightly different (R/I) passband. To enable current and future (WFIRST) surveys to routinely characterize exo-moons and distinguish among such exotic systems requires an observing strategy that includes both a cadence faster than 9 minute<SUP>-1</SUP> and observations in a second band on a similar timescale.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorSzymański, Michał
dc.contributor.authorSkowron, Jan
dc.contributor.authorSoszyński, Igor
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorHwang, K. -H.
dc.contributor.authorBond, I. A.
dc.contributor.authorAlbrow, M. D.
dc.contributor.authorChung, S. -J.
dc.contributor.authorGould, A.
dc.contributor.authorHan, C.
dc.contributor.authorJung, Y. K.
dc.contributor.authorRyu, Y. -H.
dc.contributor.authorShin, I. -G.
dc.contributor.authorYee, J. C.
dc.contributor.authorZhu, W.
dc.contributor.authorCha, S. -M.
dc.contributor.authorKim, D. -J.
dc.contributor.authorKim, H. -W.
dc.contributor.authorKim, S. -L.
dc.contributor.authorLee, C. -U.
dc.contributor.authorLee, D. -J.
dc.contributor.authorLee, Y.
dc.contributor.authorPark, B. -G.
dc.contributor.authorPogge, R. W.
dc.contributor.authorPawlak, Michał
dc.contributor.authorPoleski, Radosław
dc.contributor.authorMróz, Przemysław
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorAbe, F.
dc.contributor.authorAsakura, Y.
dc.contributor.authorBarry, R.
dc.contributor.authorBennett, D. P.
dc.contributor.authorBhattacharya, A.
dc.contributor.authorDonachie, M.
dc.contributor.authorEvans, P.
dc.contributor.authorFukui, A.
dc.contributor.authorHirao, Y.
dc.contributor.authorItow, Y.
dc.contributor.authorKawasaki, K.
dc.contributor.authorKoshimoto, N.
dc.contributor.authorLi, M. C. A.
dc.contributor.authorLing, C. H.
dc.contributor.authorMasuda, K.
dc.contributor.authorMatsubara, Y.
dc.contributor.authorMiyazaki, S.
dc.contributor.authorMuraki, Y.
dc.contributor.authorNagakane, M.
dc.contributor.authorOhnishi, K.
dc.contributor.authorRanc, C.
dc.contributor.authorRattenbury, N. J.
dc.contributor.authorSaito, To.
dc.contributor.authorSharan, A.
dc.contributor.authorSullivan, D. J.
dc.contributor.authorSumi, T.
dc.contributor.authorSuzuki, D.
dc.contributor.authorTristram, P. J.
dc.contributor.authorYamada, T.
dc.contributor.authorYonehara, A.
dc.date.accessioned2024-01-25T15:16:58Z
dc.date.available2024-01-25T15:16:58Z
dc.date.copyright2017-11-27
dc.date.issued2018
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number6
dc.description.versionORIGINAL_AUTHOR
dc.description.volume155
dc.identifier.doi10.3847/1538-3881/AAC2CB
dc.identifier.issn0004-6256
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/114490
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2018AJ....155..259H
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstronomical Journal
dc.relation.pages259
dc.rightsOther
dc.sciencecloudnosend
dc.titleOGLE-2015-BLG-1459L: The Challenges of Exo-moon Microlensing
dc.typeJournalArticle
dspace.entity.typePublication