OGLE-2016-BLG-0613LABb: A Microlensing Planet in a Binary System
Abstract
We present the analysis of OGLE-2016-BLG-0613, for which the lensing light curve appears to be that of a typical binary-lens event with two caustic spikes but with a discontinuous feature on the trough between the spikes. We find that the discontinuous feature was produced by a planetary companion to the binary lens. We find four degenerate triple-lens solution classes, each composed of a pair of solutions according to the well-known wide/close planetary degeneracy. One of these solution classes is excluded due to its relatively poor fit. For the remaining three pairs of solutions, the most-likely primary mass is about M_1 ~ 0.7 M⊙, while the planet is a super Jupiter. In all cases, the system lies in the Galactic disk, about halfway toward the Galactic bulge. However, in one of these three solution classes, the secondary of the binary system is a low-mass brown dwarf, with relative mass ratios (1:0.03:0.003), while in the two others the masses of the binary components are comparable. These two possibilities can be distinguished in about 2024 when the measured lens-source relative proper motion will permit separate resolution of the lens and source.
Additional Information
© 2017 The American Astronomical Society. Received 2017 July 13; revised 2017 September 27; accepted 2017 October 3; published 2017 November 14. Work by C.H. and D.K. was supported by the grant (2017R1A4A1015178) of National Research Foundation of Korea. The OGLE project has received funding from the National Science Centre, Poland, grant MAESTRO 2014/14/A/ST9/00121 to A. Udalski. OGLE Team thanks Profs. M. Kubiak, G. Pietrzyński, and Ł. Wyrzykowski for their contribution to the collection of the OGLE photometric data over the past years. A. Gould and W. Zhu acknowledges the support from NSF grant AST-1516842. We acknowledge the high-speed internet service (KREONET) provided by Korea Institute of Science and Technology Information (KISTI). Work by Y.S. was supported by an appointment to the NASA Postdoctoral Program at the Jet Propulsion Laboratory, California Institute of Technology, administered by Universities Space Research Association through a contract with NASA. The United Kingdom Infrared Telescope (UKIRT) is supported by NASA and operated under an agreement among the University of Hawaii, the University of Arizona, and Lockheed Martin Advanced Technology Center; operations are enabled through the cooperation of the Joint Astronomy Centre of the Science and Technology Facilities Council of the U.K. We acknowledge the support from NASA HQ for the UKIRT observations in connection with K2C9. Work by S.M. was supported by the National Science Foundation of China (11333003 and 11390372). This research has made use of the KMTNet system operated by the Korea Astronomy and Space Science Institute (KASI) and the data were obtained at three host sites of CTIO in Chile, SAAO in South Africa, and SSO in Australia.Attached Files
Published - Han_2017_AJ_154_223.pdf
Submitted - 1710.00924.pdf
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Additional details
- Eprint ID
- 83205
- Resolver ID
- CaltechAUTHORS:20171114-151611882
- 2017R1A4A1015178
- National Research Foundation of Korea
- 2014/14/A/ST9/00121
- National Science Centre (Poland)
- AST-1516842
- NSF
- NASA Postdoctoral Program
- NASA/JPL/Caltech
- 11333003
- National Natural Science Foundation of China
- 11390372
- National Natural Science Foundation of China
- Created
-
2017-11-14Created from EPrint's datestamp field
- Updated
-
2021-11-15Created from EPrint's last_modified field
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)