R.A. Street
OGLE-2018-BLG-0022: A Nearby M-dwarf Binary
Street, R.A.; Bachelet, E.; Tsapras, Y.; Hundertmark, M.P.G.; Bozza, V.; Dominik, M.; REA, ROME; Teams, MiNDSTEp; Team, ROME/REA; Bramich, D.M.; Cassan, A.; Horne, K.; Mao, S.; Saha, A.; Wambsganss, J.; Zang, Weicheng; Team, MiNDSTEp; Jørgensen, U.G.; Longa-Peña, P.; Peixinho, N.; Sajadian, S.; Burgdorf, M.J.; Campbell-White, J.; Dib, S.; Evans, D.F.; Fujii, Y.I.; Hinse, T.C.; Khalouei, E.; Lowry, S.; Rahvar, S.; Rabus, M.; Skottfelt, J.; Snodgrass, C.; Southworth, J.; Tregloan-Reed, J.
Authors
E. Bachelet
Y. Tsapras
M.P.G. Hundertmark
V. Bozza
M. Dominik
ROME REA
MiNDSTEp Teams
ROME/REA Team
D.M. Bramich
A. Cassan
K. Horne
S. Mao
A. Saha
J. Wambsganss
Weicheng Zang
MiNDSTEp Team
U.G. Jørgensen
P. Longa-Peña
N. Peixinho
S. Sajadian
M.J. Burgdorf
J. Campbell-White
S. Dib
D.F. Evans
Y.I. Fujii
T.C. Hinse
E. Khalouei
S. Lowry
S. Rahvar
M. Rabus
J. Skottfelt
C. Snodgrass
Dr John Taylor j.k.taylor@keele.ac.uk
J. Tregloan-Reed
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.
Journal Article Type | Article |
---|---|
Acceptance Date | Mar 14, 2019 |
Online Publication Date | May 7, 2019 |
Publication Date | May 7, 2019 |
Publicly Available Date | Mar 29, 2024 |
Journal | Astronomical Journal |
Print ISSN | 0004-6256 |
Electronic ISSN | 1538-3881 |
Publisher | American Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 157 |
Issue | 6 |
Article Number | 215 |
DOI | https://doi.org/10.3847/1538-3881/ab1538 |
Keywords | binaries, general, gravitational lensing, micro, techniques, photometric |
Publisher URL | https://doi.org/10.3847/1538-3881/ab1538 |
Files
steet-southworth-2019-ogle-2018-blg-0022.pdf
(1.5 Mb)
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