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OGLE-2018-BLG-0022: A Nearby M-dwarf Binary

Street, R. A., Bachelet, E., Tsapras, Y., Hundertmark, M. P. G., Bozza, V., Dominik, M., Bramich, D. M., Cassan, A., Horne, K., Mao, S., and others. (2019) OGLE-2018-BLG-0022: A Nearby M-dwarf Binary. The Astronomical Journal, 157 (6). Article Number 215. ISSN 1538-3881. (doi:10.3847/1538-3881/ab1538) (KAR id:74003)

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We report observations of the binary microlensing event OGLE-2018-BLG-0022, provided by the Robotic Observations of Microlensing Events (ROME)/Reactive Event Assessment (REA) Survey, which indicate that the lens is a low-mass binary star consisting of M3 (0.375 ± 0.020 M ⊙) and M7 (0.098 ± 0.005 M ⊙) components. The lens is unusually close, at 0.998 ± 0.047 kpc, compared with the majority of microlensing events, and despite its intrinsically low luminosity, it is likely that adaptive optics observations in the near future will be able to provide an independent confirmation of the lens masses.

Item Type: Article
DOI/Identification number: 10.3847/1538-3881/ab1538
Uncontrolled keywords: binaries: general – gravitational lensing: micro – techniques: photometric
Subjects: Q Science > QB Astronomy
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: Stephen Lowry
Date Deposited: 21 May 2019 09:41 UTC
Last Modified: 03 Sep 2021 14:00 UTC
Resource URI: (The current URI for this page, for reference purposes)
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