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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 742463.0, MPI für Astronomie / Publikationen_mpia
OGLE-2016-BLG-0693LB: Probing the brown dwarf desert with microlensing
Authors:Ryu, Y. -. H.; Udalski, A.; Yee, J. C.; Albrow, M. D.; Chung, S. -. J.; Gould, A.; Han, C.; Hwang, K. -. H.; Jung, Y. K.; Shin, I. -. G.; Zhu, W.; Cha, S. -. M.; Kim, D. -. J.; Kim, H. -. W.; Kim, S. -. L.; Lee, C. -. U.; Lee, Y.; Park, B. -. G.; Pogge, R. W.; Collaboration, T. K.; Pietrukowicz, P.; Kozłowski, S.; Poleski, R.; Skowron, J.; Mróz, P.; Szymański, M. K.; Soszyński, I.; Pawlak, M.; Ulaczyk, K.; Collaboration, T. O.
Date of Publication (YYYY-MM-DD):2017
Title of Journal:The Astronomical Journal
Issue / Number:6
Start Page:id. 247 (12 pp)
Audience:Not Specified
Abstract / Description:We present an analysis of microlensing event OGLE-2016-BLG-0693, based on the survey-only microlensing observations by the OGLE and KMTNet groups. In order to analyze the light curve, we consider the effects of parallax, orbital motion, and baseline slope, and also refine the result using a Galactic model prior. From the microlensing analysis, we find that the event is a binary composed of a low-mass brown dwarf ({49}-18+20 {M}J) companion and a K- or G-dwarf host, which lies at a distance of 5.0 ± 0.6 kpc toward the Galactic bulge. The projected separation between the brown dwarf and its host star is less than ∼5 au, thus it is likely that the brown dwarf companion is located in the brown dwarf desert.
Free Keywords:binaries: general; brown dwarfs; gravitational lensing: micro
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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