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OGLE-2011-BLG-0265Lb: A Jovian Microlensing Planet Orbiting an M Dwarf

Skowron, J. and Kane, S. R. and Calchi Novati, S. (2015) OGLE-2011-BLG-0265Lb: A Jovian Microlensing Planet Orbiting an M Dwarf. Astrophysical Journal, 804 (1). Art. No. 33. ISSN 0004-637X.

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We report the discovery of a Jupiter-mass planet orbiting an M-dwarf star that gave rise to the microlensing event OGLE-2011-BLG-0265. Such a system is very rare among known planetary systems and thus the discovery is important for theoretical studies of planetary formation and evolution. High-cadence temporal coverage of the planetary signal, combined with extended observations throughout the event, allows us to accurately model the observed light curve. However, the final microlensing solution remains degenerate, yielding two possible configurations of the planet and the host star. In the case of the preferred solution, the mass of the planet is M_p = 0.9 ± 0.3 M_J, and the planet is orbiting a star with a mass M = 0.22 ± 0.06 M_☉. The second possible configuration (2σ away) consists of a planet with M_p = 0.6 ± 0.3 M_J and host star with M = 0.14 ± 0.06 M_☉. The system is located in the Galactic disk 3–4 kpc toward the Galactic bulge. In both cases, with an orbit size of 1.5–2.0 AU, the planet is a "cold Jupiter"—located well beyond the "snow line" of the host star. Currently available data make the secure selection of the correct solution difficult, but there are prospects for lifting the degeneracy with additional follow-up observations in the future, when the lens and source star separate.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Skowron, J.0000-0002-2335-1730
Kane, S. R.0000-0002-7084-0529
Calchi Novati, S.0000-0002-7669-1069
Additional Information:© 2015 American Astronomical Society. Received 2014 October 29; accepted 2015 February 23; published 2015 April 27. The OGLE project has received funding from the European Research Council under the European Community’s Seventh Framework Programme (FP7/2007-2013) / ERC grant agreement No. 246678 to A.U. This research was partly supported by the Polish Ministry of Science and Higher Education (MNiSW) through the program “Iuventus Plus” award No. IP2011 026771. Work by C.H. was supported by Creative Research Initiative Program (2009-0081561) of National Research Foundation of Korea. The MOA experiment was supported by grants JSPS22403003 and JSPS23340064. T.S. acknowledges the support of JSPS 24253004. T.S. is supported by the grant JSPS23340044. Y.M. acknowledges support from JSPS grants JSPS23540339 and JSPS19340058. Work by J.C. Y. is supported in part by a Distinguished University Fellowship from The Ohio State University and in part under contract with the California Institute of Technology (Caltech) funded by NASA through the Sagan Fellowship Program. Work by A.G. and B.S.G was supported by NSF grant AST 1103471. Work by A.G., B.S.G., and RWP was supported by NASA grant NNX12AB99G. T.S. acknowledges support from the grants JSPS23340044 and JSPS24253004. C.S. received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement No. 268421. This work is based in part on data collected by MiNDSTEp with the Danish 1.54 m telescope at the ESO La Silla Observatory. The Danish 1.54 m telescope is operated based on a grant from the Danish Natural Science Foundation (FNU). The MiNDSTEp monitoring campaign is powered by ARTEMiS (Automated Terrestrial Exoplanet Microlensing Search; Dominik et al. 2008, AN 329, 248). M.H. acknowledges support by the German Research Foundation (DFG). D.R. (boursier FRIA) and J.S. acknowledge support from the Communauté française de Belgique—Actions de recherche concertées—Académie universitaire Wallonie-Europe. K.A., D.M.B., M.D., K.H., M. H., C.L., C.S., R.A.S., and Y.T. are thankful to the Qatar National Research Fund (QNRF), member of Qatar Foundation, for support by grant NPRP 09-476-1-078. Work by D.D. P. was supported by the University of Rijeka Project This research was supported by the I-CORE program of the Planning and Budgeting Committee and the Israel Science Foundation, grant 1829/12. D.M. and A.G. acknowledge support by the US-Israel Binational Science Foundation.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
European Research Council (ERC)246678
Ministry of Science and Higher Education (Poland)IP2011 026771
National Research Foundation of KoreaUNSPECIFIED
Japan Society for the Promotion of Science (JSPS)JSPS22403003
Japan Society for the Promotion of Science (JSPS)JSPS23340064
Japan Society for the Promotion of Science (JSPS)JSPS24253004
Japan Society for the Promotion of Science (JSPS)JSPS23340044
Japan Society for the Promotion of Science (JSPS)JSPS23540339
Japan Society for the Promotion of Science (JSPS)JSPS19340058
Ohio State University Distinguished University FellowshipUNSPECIFIED
NASA/Caltech/Sagan Fellowship ProgramUNSPECIFIED
NSFAST 1103471
European Research Council (ERC)268421
Danish Natural Science FoundationUNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Communauté française de Belgique—Actions de recherche concertées—Académie universitaire Wallonie-EuropeUNSPECIFIED
Qatar National Research FundNPRP 09-476-1-078
University of Rijeka13.
Israel Science Foundation1829/12
Binational Science Foundation (USA-Israel)UNSPECIFIED
Subject Keywords:gravitational lensing: micro; planetary systems
Issue or Number:1
Record Number:CaltechAUTHORS:20150608-085943407
Persistent URL:
Official Citation:OGLE-2011-BLG-0265Lb: A Jovian Microlensing Planet Orbiting an M Dwarf J. Skowron et al. 2015 ApJ 804 33
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:58073
Deposited By: Ruth Sustaita
Deposited On:08 Jun 2015 18:17
Last Modified:09 Mar 2020 13:19

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