OGLE-2018-BLG-0022: a nearby M-dwarf binary

R. A. Street; E. Bachelet; Y. Tsapras; M. P. G. Hundertmark; V. Bozza; M. Dominik; D. M. Bramich; A. Cassan; K. Horne; S. Mao; A. Saha; J. Wambsganss; Weicheng Zang; 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; J. Southworth; J. Tregloan-Reed

doi:10.3847/1538-3881/ab1538

OGLE-2018-BLG-0022: a nearby M-dwarf binary

R. A. Street, E. Bachelet, Y. Tsapras, M. P. G. Hundertmark, V. Bozza, M. Dominik, D. M. Bramich, A. Cassan, K. Horne, S. Mao, A. Saha, J. Wambsganss, Weicheng Zang, U. G. Jørgensen, P. Longa-Peña, N. Peixinho, S. Sajadian, M. J. Burgdorf, J. Campbell-White, S. DibD. F. Evans, Y. I. Fujii, T. C. Hinse, E. Khalouei, S. Lowry, S. Rahvar, M. Rabus, J. Skottfelt, C. Snodgrass, J. Southworth, J. Tregloan-Reed

Research output: Contribution to journal › Article › peer-review

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 ± 0.020 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.

Original language	English
Article number	215
Number of pages	11
Journal	Astronomical Journal
Volume	157
Issue number	6
Early online date	7 May 2019
DOIs	https://doi.org/10.3847/1538-3881/ab1538
Publication status	Published - Jun 2019

Keywords

Binaries: general
Gravitational lensing: micro
Techniques: photometric

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10.3847/1538-3881/ab1538

1903.08733
© 2019, American Astronomical Society. This work has been made available online in accordance with the publisher's policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.3847/1538-3881/ab1538
Accepted author manuscript, 8.83 MB

http://adsabs.harvard.edu/abs/2019arXiv190308733S

Astronomy at St Andrews 2018-2021: Astronomy at St Andrews 2018-2021
Jardine, M. M. (PI), Bonnell, I. A. (CoI), Cameron, A. C. (CoI), Cyganowski, C. J. (CoI), Dominik, M. (CoI), Helling, C. (CoI), Horne, K. D. (CoI), Scholz, A. (CoI), Tojeiro, R. (CoI), Weijmans, A.-M. (CoI), Wild, V. (CoI), Woitke, P. (CoI), Wood, K. (CoI) & Zhao, H. (CoI)
1/04/18 → 31/03/22
Project: Standard

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Street, R. A., Bachelet, E., Tsapras, Y., Hundertmark, M. P. G., Bozza, V., Dominik, M., Bramich, D. M., Cassan, A., Horne, K., Mao, S., Saha, A., Wambsganss, J., Zang, W., Jørgensen, U. G., Longa-Peña, P., Peixinho, N., Sajadian, S., Burgdorf, M. J., Campbell-White, J., ... Tregloan-Reed, J. (2019). OGLE-2018-BLG-0022: a nearby M-dwarf binary. Astronomical Journal, 157(6), Article 215. https://doi.org/10.3847/1538-3881/ab1538

@article{77f41e5d138547dbb694ffcc95965baa,

title = "OGLE-2018-BLG-0022: a nearby M-dwarf binary",

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 ± 0.020 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.",

keywords = "Binaries: general, Gravitational lensing: micro, Techniques: photometric",

author = "Street, {R. A.} and E. Bachelet and Y. Tsapras and Hundertmark, {M. P. G.} and V. Bozza and M. Dominik and Bramich, {D. M.} and A. Cassan and K. Horne and S. Mao and A. Saha and J. Wambsganss and Weicheng Zang and J{\o}rgensen, {U. G.} and P. Longa-Pe{\~n}a and N. Peixinho and S. Sajadian and Burgdorf, {M. J.} and J. Campbell-White and S. Dib and Evans, {D. F.} and Fujii, {Y. I.} and Hinse, {T. C.} and E. Khalouei and S. Lowry and S. Rahvar and M. Rabus and J. Skottfelt and C. Snodgrass and J. Southworth and J. Tregloan-Reed",

note = "Funding: UK STFC grant ST/R000824/1 (KH).",

year = "2019",

month = jun,

doi = "10.3847/1538-3881/ab1538",

language = "English",

volume = "157",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

number = "6",

}

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, UG, 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 & Tregloan-Reed, J 2019, 'OGLE-2018-BLG-0022: a nearby M-dwarf binary', Astronomical Journal, vol. 157, no. 6, 215. https://doi.org/10.3847/1538-3881/ab1538

TY - JOUR

T1 - OGLE-2018-BLG-0022

T2 - a nearby M-dwarf binary

AU - Street, R. A.

AU - Bachelet, E.

AU - Tsapras, Y.

AU - Hundertmark, M. P. G.

AU - Bozza, V.

AU - Dominik, M.

AU - Bramich, D. M.

AU - Cassan, A.

AU - Horne, K.

AU - Mao, S.

AU - Saha, A.

AU - Wambsganss, J.

AU - Zang, Weicheng

AU - Jørgensen, U. G.

AU - Longa-Peña, P.

AU - Peixinho, N.

AU - Sajadian, S.

AU - Burgdorf, M. J.

AU - Campbell-White, J.

AU - Dib, S.

AU - Evans, D. F.

AU - Fujii, Y. I.

AU - Hinse, T. C.

AU - Khalouei, E.

AU - Lowry, S.

AU - Rahvar, S.

AU - Rabus, M.

AU - Skottfelt, J.

AU - Snodgrass, C.

AU - Southworth, J.

AU - Tregloan-Reed, J.

N1 - Funding: UK STFC grant ST/R000824/1 (KH).

PY - 2019/6

Y1 - 2019/6

N2 - 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.

AB - 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.

KW - Binaries: general

KW - Gravitational lensing: micro

KW - Techniques: photometric

U2 - 10.3847/1538-3881/ab1538

DO - 10.3847/1538-3881/ab1538

M3 - Article

SN - 0004-6256

VL - 157

JO - Astronomical Journal

JF - Astronomical Journal

IS - 6

M1 - 215

ER -

OGLE-2018-BLG-0022: a nearby M-dwarf binary

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Keywords

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Astronomy at St Andrews 2018-2021: Astronomy at St Andrews 2018-2021

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