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Discovery of a Gas Giant Planet in Microlensing Event Ogle-2014-BLG-1760We present the analysis of the planetary microlensing event OGLE-2014-BLG-1760, which shows a strong light-curve signal due to the presence of a Jupiter mass ratio planet. One unusual feature of this event is that the source star is quite blue, with V-I = 1.48 +/- 0.08. This is marginally consistent with a source star in the Galactic bulge, but it could possibly indicate a young source star on the far side of the disk. Assuming a bulge source, we perform a Bayesian analysis assuming a standard Galactic model, and this indicates that the planetary system resides in or near the Galactic bulge at D(sub L) = 6.9 +/- 1.1 kpc. It also indicates a host-star mass of M(sub *) = 0.51(sup + 0.44/sub -0.28) M(sub theta), a planet mass of m(sub p ) = 0.56(sup +0.34/sub -0.26) M(sub J), and a projected star-planet separation of a(perpendicular) = 1.75(sup +0.33/sub -0.34) au. The lens-source relative proper motion is micro(sub rel) = 6.5 +/- 1.1mas per yr. The lens (and stellar host star) is estimated to be very faint compared to the source star, so it is most likely that it can be detected only when the lens and source stars start to separate. Due to the relatively high relative proper motion, the lens and source will be resolved to about approximately 46 mas in 6-8 yr after the peak magnification. So, by 2020-2022, we can hope to detect the lens star with deep, high-resolution images.
Document ID
20160013715
Document Type
Reprint (Version printed in journal)
Authors
Bhattacharya, A. (Notre Dame Univ. Notre Dame, IN, United States)
Bennett, D. P. (Maryland Univ. Baltimore County Baltimore, MD, United States)
Bond, I. A. (Massey University Auckland Auckland, New Zealand)
Sumi, T. (Osaka Univ. Osaka, Japan)
Udalski, A. (Warsaw Univ. Observatory Warsaw, Poland)
Street, R. (Las Cumbres Observatory Global Telescope Network, Inc. Goleta, CA, United States)
Tsapras, Y. (Las Cumbres Observatory Global Telescope Network, Inc. Goleta, CA, United States)
Abe, F. (Nagoya Univ. Nagoya, Japan)
Freeman, M. (Auckland Univ. New Zealand)
Fukui, A. (National Astronomical Observatory Okayama, Japan)
Date Acquired
November 22, 2016
Publication Date
October 27, 2016
Publication Information
Publication: The Astronomical Journal
Volume: 152
Issue: 5
ISSN: 0004-6256
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN37479
GSFC-E-DAA-TN42333
Funding Number(s)
CONTRACT_GRANT: JSPS24253004
CONTRACT_GRANT: MAESTRO-2014-14-A-ST9-00121
CONTRACT_GRANT: MFRS-NZ-MAU1104
CONTRACT_GRANT: NNX12AF54G
CONTRACT_GRANT: JSPS23103002
CONTRACT_GRANT: JSPS26247023
CONTRACT_GRANT: JSPS25103508
CONTRACT_GRANT: NNG06EO90A
CONTRACT_GRANT: AB261005
CONTRACT_GRANT: NNX13AF64G
CONTRACT_GRANT: JSPS23340064
CONTRACT_GRANT: QNRF-X-019-1-006
Distribution Limits
Public
Copyright
Other
Keywords
Galactic bulge
OGLE-2014-BLG-1760
Jupiter mass ratio planet