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OGLE-2013-BLG-1761Lb: A Massive Planet around an M/K Dwarf

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cris.lastimport.scopus2024-02-12T19:36:19Z
dc.abstract.enWe report the discovery and the analysis of the planetary microlensing event, OGLE-2013-BLG-1761. There are some degenerate solutions in this event because the planetary anomaly is only sparsely sampled. However, the detailed light-curve analysis ruled out all stellar binary models and shows the lens to be a planetary system. There is the so-called close/wide degeneracy in the solutions with the planet/host mass ratio of q ∼ (7.0 ± 2.0) × 10<SUP>-3</SUP> and q ∼ (8.1 ± 2.6) × 10<SUP>-3</SUP> with the projected separation in Einstein radius units of s = 0.95 (close) and s = 1.18 (wide), respectively. The microlens parallax effect is not detected, but the finite source effect is detected. Our Bayesian analysis indicates that the lens system is located D<SUB>L</SUB>=6.9<SUB>-1.2</SUB><SUP>+1.0</SUP> kpc away from us and the host star is an M/K dwarf with a mass of M<SUB>L</SUB>=0.33<SUB>-0.19</SUB><SUP>+0.32</SUP> M<SUB>☉</SUB> orbited by a super-Jupiter mass planet with a mass of m<SUB>P</SUB>=2.7<SUB>-1.5</SUB><SUP>+2.5</SUP> M<SUB>Jup</SUB> at the projected separation of a<SUB>\perp</SUB>=1.8<SUB>-0.5</SUB><SUP>+0.5</SUP> au. The preference of the large lens distance in the Bayesian analysis is due to the relatively large observed source star radius. The distance and other physical parameters may be constrained by the future high-resolution imaging by large ground telescopes or HST. If the estimated lens distance is correct, then this planet provides another sample for testing the claimed deficit of planets in the Galactic bulge.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorHirao, Y.
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorSumi, T.
dc.contributor.authorBennett, D. P.
dc.contributor.authorKoshimoto, N.
dc.contributor.authorBond, I. A.
dc.contributor.authorRattenbury, N. J.
dc.contributor.authorSuzuki, D.
dc.contributor.authorAbe, F.
dc.contributor.authorAsakura, Y.
dc.contributor.authorBarry, R. K.
dc.contributor.authorBhattacharya, A.
dc.contributor.authorDonachie, M.
dc.contributor.authorEvans, P.
dc.contributor.authorFukui, A.
dc.contributor.authorItow, Y.
dc.contributor.authorLi, M. C. A.
dc.contributor.authorLing, C. H.
dc.contributor.authorMasuda, K.
dc.contributor.authorMatsubara, Y.
dc.contributor.authorMatsuo, T.
dc.contributor.authorMuraki, Y.
dc.contributor.authorNagakane, M.
dc.contributor.authorOhnishi, K.
dc.contributor.authorRanc, C.
dc.contributor.authorSaito, To.
dc.contributor.authorSharan, A.
dc.contributor.authorShibai, H.
dc.contributor.authorSullivan, D. J.
dc.contributor.authorTristram, P. J.
dc.contributor.authorYamada, T.
dc.contributor.authorYonehara, A.
dc.contributor.authorPoleski, Radosław
dc.contributor.authorSkowron, Jan
dc.contributor.authorMróz, Przemysław
dc.contributor.authorSzymański, Michał
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorSoszyński, Igor
dc.contributor.authorWyrzykowski, Łukasz
dc.contributor.authorUlaczyk, Krzysztof
dc.date.accessioned2024-01-25T15:16:23Z
dc.date.available2024-01-25T15:16:23Z
dc.date.copyright2017-03-22
dc.date.issued2017
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number1
dc.description.versionORIGINAL_AUTHOR
dc.description.volume154
dc.identifier.doi10.3847/1538-3881/AA73DA
dc.identifier.issn0004-6256
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/114482
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2017AJ....154....1H
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstronomical Journal
dc.relation.pages1
dc.rightsOther
dc.sciencecloudnosend
dc.titleOGLE-2013-BLG-1761Lb: A Massive Planet around an M/K Dwarf
dc.typeJournalArticle
dspace.entity.typePublication