Street, RA, Bachelet, E, Tsapras, Y, Hundertmark, MPG, Bozza, V, Dominik, M, Bramich, DM, Cassan, A, Horne, K, Mao, S, Saha, A, Wambsganss, J, Zang, W, Jørgensen, U, Longa-Peña, P, Peixinho, N, Sajadian, S, Burgdorf, MJ, Campbell-White, J, Dib, S, Evans, DF, Fujii, YI, Hinse, TC, Khalouei, E, Lowry, S, Rahvar, S, Rabus, M, Skottfelt, J, Snodgrass, C, Southworth, J and Tregloan-Reed, J (2019) OGLE-2018-BLG-0022: A Nearby M-dwarf Binary. Astronomical Journal, 157 (6). 215-?.

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Abstract

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±0.020Me) and M7 (0.098±0.005Me) 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
Additional Information: This is the final published version of the article (version of record). It first appeared online via IOP Publishing Ltd. at https://doi.org/10.3847/1538-3881/ab1538 - please refer to any applicable terms of use of the publisher.
Uncontrolled Keywords: binaries, general, gravitational lensing, micro, techniques, photometric
Subjects: Q Science > QB Astronomy
Q Science > QB Astronomy > QB799 Stars
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Depositing User: Symplectic
Date Deposited: 23 May 2019 08:34
Last Modified: 28 May 2019 14:54
URI: http://eprints.keele.ac.uk/id/eprint/6380

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