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    OGLE-2016-BLG-1469L: Microlensing Binary Composed of Brown Dwarfs

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    Author
    Han C
    Udalski A
    Sumi T
    Gould A
    Albrow MD
    Chung SJ
    Jung YK
    Ryu YH
    Shin IG
    Yee JC
    Zhu W
    Cha SM
    Kim SL
    Kim DJ
    Lee CU
    Lee Y
    Park BG
    Soszyński I
    Mróz P
    Pietrukowicz P
    Szymański MK
    Skowron J
    Poleski R
    Kozłowski S
    Ulaczyk K
    Pawlak M
    Abe F
    Asakura Y
    Bennett DP
    Bond IA
    Bhattacharya A
    Donachie M
    Freeman M
    Fukui A
    Hirao Y
    Itow Y
    Koshimoto N
    Li MCA
    Ling CH
    Masuda K
    Matsubara Y
    Muraki Y
    Nagakane M
    Ohnishi K
    Oyokawa H
    Rattenbury NJ
    Saito T
    Sharan A
    Sullivan DJ
    Suzuki D
    Tristram PJ
    Yamada T
    Yamada T
    Yonehara A
    Barry R
    Date
    2017
    Permanent Link
    http://hdl.handle.net/10092/14948

    © 2017. The American Astronomical Society. All rights reserved. We report the discovery of a binary composed of two brown dwarfs, based on the analysis of the microlensing event OGLE-2016-BLG-1469. Thanks to the detection of both finite-source and microlens-parallax effects, we are able to measure both the masses M 1 ∼ 0.05 M⊙ and M 2 ∼ 0.01 M⊙, and the distance D L ∼ 4.5 kpc, as well as the projected separation a ⊥ ∼ 0.33 au. This is the third brown-dwarf binary detected using the microlensing method, demonstrating the usefulness of microlensing in detecting field brown-dwarf binaries with separations of less than 1 au.

    Subjects
    binaries: general
     
    brown dwarfs
     
    gravitational lensing: micro
     
    Field of Research::02 - Physical Sciences::0201 - Astronomical and Space Sciences::020103 - Cosmology and Extragalactic Astronomy
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    • Science: Journal Articles [515]

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