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

Ryu, Y.-H., Yee, J. C., Udalski, A., Bond, I. A., Shvartzvald, Y., Zang, W., et al. (2018). OGLE-2016-BLG-1190Lb: The First Spitzer Bulge Planet Lies Near the Planet/Brown-dwarf Boundary. The Astronomical Journal, 155(1): 40. doi:10.3847/1538-3881/aa9be4.

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Ryu, Y.-H., Author
Yee, J. C., Author
Udalski, A., Author
Bond, I. A., Author
Shvartzvald, Y., Author
Zang, W., Author
Figuera, Jaimes R. , Author
Jørgensen, U. G., Author
Zhu, W., Author
Huang, C. X., Author
Jung, Y. K., Author
Albrow, M. D., Author
Chung, S.-J., Author
Gould, A., Author
Han, C., Author
Hwang, K.-H., Author
Shin, I.-G., Author
Cha, S.-M., Author
Kim, D.-J., Author
Kim, H.-W., Author
Kim, S.-L., AuthorLee, C.-U., AuthorLee, D.-J., AuthorLee, Y., AuthorPark, B.-G., AuthorPogge, R. W., AuthorCalchi, Novati S. , AuthorCarey, S., AuthorHenderson, C. B., AuthorBeichman, C., AuthorGaudi, B. S., AuthorMróz, P., AuthorPoleski, R., AuthorSkowron, J., AuthorSzymański, M. K., AuthorSoszyński, I., AuthorKozłowski, S., AuthorPietrukowicz, P., AuthorUlaczyk, K., AuthorPawlak, M., AuthorAbe, F., AuthorAsakura, Y., AuthorBarry, R., AuthorBennett, D. P., AuthorBhattacharya, A., AuthorDonachie, M., AuthorEvans, P., AuthorFukui, A., AuthorHirao, Y., AuthorItow, Y., AuthorKawasaki, K., AuthorKoshimoto, N., AuthorLi, M. C. A., AuthorLing, C. H., AuthorMasuda, K., AuthorMatsubara, Y., AuthorMiyazaki, S., AuthorMuraki, Y., AuthorNagakane, M., AuthorOhnishi, K., AuthorRanc, C., AuthorRattenbury, N. J., AuthorSaito, To, AuthorSharan, A., AuthorSullivan, D. J., AuthorSumi, T., AuthorSuzuki, D., AuthorTristram, P. J., AuthorYamada, T., AuthorYamada, T., AuthorYonehara, A., AuthorBryden, G., AuthorHowell, S. B., AuthorJacklin, S., AuthorPenny, M. T., AuthorMao, S., AuthorFouqué, Pascal, AuthorWang, T., AuthorStreet, R. A., AuthorTsapras, Y., AuthorHundertmark, M., AuthorBachelet, E., AuthorDominik, M., AuthorLi, Z., AuthorCross, S., AuthorCassan, A., AuthorHorne, K., AuthorSchmidt, R., AuthorWambsganss, J., AuthorMent, S. K., AuthorMaoz, D., AuthorSnodgrass, C., AuthorSteele, I. A., AuthorBozza, V., AuthorBurgdorf, M. J., AuthorCiceri, S., AuthorD'Ago, G., AuthorEvans, D. F., AuthorHinse, T. C., AuthorKerins, E., AuthorKokotanekova, Rosita1, Author              Longa, P., AuthorMacKenzie, J., AuthorPopovas, A., AuthorRabus, M., AuthorRahvar, S., AuthorSajadian, S., AuthorSkottfelt, J., AuthorSouthworth, J., Authorvon Essen, C., Author more..
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              


Free keywords: -
 Abstract: We 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 p = 13.4 ± 0.9 M J , 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 host = 0.89 ± 0.07 M , 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.


Language(s): eng - English
 Dates: 2019-03-192018
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.3847/1538-3881/aa9be4
 Degree: -



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Title: The Astronomical Journal
Source Genre: Journal
Publ. Info: Chicago, IL : University of Chicago Press for the American Astronomical Society
Pages: - Volume / Issue: 155 (1) Sequence Number: 40 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_4