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OGLE-2016-BLG-1190Lb: The First Spitzer Bulge Planet Lies Near the Planet/Brown-dwarf Boundary

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dc.abstract.enWe report the discovery of OGLE-2016-BLG-1190Lb, which is likely to be the first Spitzer microlensing planet in the Galactic bulge/bar, an assignation that can be confirmed by two epochs of high-resolution imaging of the combined source-lens baseline object. The planet’s mass, M <SUB> p </SUB> = 13.4 ± 0.9 M <SUB> J </SUB>, places it right at the deuterium-burning limit, i.e., the conventional boundary between “planets” and “brown dwarfs.” Its existence raises the question of whether such objects are really “planets” (formed within the disks of their hosts) or “failed stars” (low-mass objects formed by gas fragmentation). This question may ultimately be addressed by comparing disk and bulge/bar planets, which is a goal of the Spitzer microlens program. The host is a G dwarf, M <SUB>host</SUB> = 0.89 ± 0.07 M <SUB>⊙</SUB>, and the planet has a semimajor axis a ˜ 2.0 au. We use Kepler K2 Campaign 9 microlensing data to break the lens-mass degeneracy that generically impacts parallax solutions from Earth-Spitzer observations alone, which is the first successful application of this approach. The microlensing data, derived primarily from near-continuous, ultradense survey observations from OGLE, MOA, and three KMTNet telescopes, contain more orbital information than for any previous microlensing planet, but not quite enough to accurately specify the full orbit. However, these data do permit the first rigorous test of microlensing orbital-motion measurements, which are typically derived from data taken over <1% of an orbital period.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorUdalski, Andrzej
dc.contributor.authorSkowron, Jan
dc.contributor.authorSzymański, Michał
dc.contributor.authorSoszyński, Igor
dc.contributor.authorKozłowski, Szymon
dc.contributor.authorPietrukowicz, Paweł
dc.contributor.authorRyu, Y. -H.
dc.contributor.authorYee, J. C.
dc.contributor.authorBond, I. A.
dc.contributor.authorShvartzvald, Y.
dc.contributor.authorZang, W.
dc.contributor.authorJaimes, R. Figuera
dc.contributor.authorJørgensen, U. G.
dc.contributor.authorZhu, W.
dc.contributor.authorHuang, C. X.
dc.contributor.authorJung, Y. K.
dc.contributor.authorAlbrow, M. D.
dc.contributor.authorChung, S. -J.
dc.contributor.authorGould, A.
dc.contributor.authorHan, C.
dc.contributor.authorHwang, K. -H.
dc.contributor.authorShin, I. -G.
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.authorNovati, S. Calchi
dc.contributor.authorCarey, S.
dc.contributor.authorHenderson, C. B.
dc.contributor.authorBeichman, C.
dc.contributor.authorGaudi, B. S.
dc.contributor.authorMróz, Przemysław
dc.contributor.authorPoleski, Radosław
dc.contributor.authorUlaczyk, Krzysztof
dc.contributor.authorPawlak, Michał
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.contributor.authorBryden, G.
dc.contributor.authorHowell, S. B.
dc.contributor.authorJacklin, S.
dc.contributor.authorPenny, M. T.
dc.contributor.authorMao, S.
dc.contributor.authorFouqué, Pascal
dc.contributor.authorWang, T.
dc.contributor.authorStreet, R. A.
dc.contributor.authorTsapras, Y.
dc.contributor.authorHundertmark, M.
dc.contributor.authorBachelet, E.
dc.contributor.authorDominik, M.
dc.contributor.authorLi, Z.
dc.contributor.authorCross, S.
dc.contributor.authorCassan, A.
dc.contributor.authorHorne, K.
dc.contributor.authorSchmidt, R.
dc.contributor.authorWambsganss, J.
dc.contributor.authorMent, S. K.
dc.contributor.authorMaoz, D.
dc.contributor.authorSnodgrass, C.
dc.contributor.authorSteele, I. A.
dc.contributor.authorBozza, V.
dc.contributor.authorBurgdorf, M. J.
dc.contributor.authorCiceri, S.
dc.contributor.authorD'Ago, G.
dc.contributor.authorEvans, D. F.
dc.contributor.authorHinse, T. C.
dc.contributor.authorKerins, E.
dc.contributor.authorKokotanekova, R.
dc.contributor.authorLonga, P.
dc.contributor.authorMacKenzie, J.
dc.contributor.authorPopovas, A.
dc.contributor.authorRabus, M.
dc.contributor.authorRahvar, S.
dc.contributor.authorSajadian, S.
dc.contributor.authorSkottfelt, J.
dc.contributor.authorSouthworth, J.
dc.contributor.authorEssen, C. von
dc.date.accessioned2024-01-25T15:40:36Z
dc.date.available2024-01-25T15:40:36Z
dc.date.copyright2017-10-27
dc.date.issued2018
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number1
dc.description.versionORIGINAL_AUTHOR
dc.description.volume155
dc.identifier.doi10.3847/1538-3881/AA9BE4
dc.identifier.issn0004-6256
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/114504
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2018AJ....155...40R
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstronomical Journal
dc.relation.pages40
dc.rightsOther
dc.sciencecloudnosend
dc.titleOGLE-2016-BLG-1190Lb: The First Spitzer Bulge Planet Lies Near the Planet/Brown-dwarf Boundary
dc.typeJournalArticle
dspace.entity.typePublication