OGLE-2018-BLG-0022: a nearby M-dwarf binary
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 ⊙...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2019 May 7
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| In: |
The astronomical journal
Year: 2019, Volume: 157, Issue: 6, Pages: 215 |
| ISSN: | 1538-3881 |
| DOI: | 10.3847/1538-3881/ab1538 |
| Online Access: | Verlag, Volltext: https://doi.org/10.3847/1538-3881/ab1538
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| Author Notes: | 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, and J. Tregloan-Reed |
| Summary: | 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. |
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| Item Description: | Gesehen am 04.06.2019 |
| Physical Description: | Online Resource |
| ISSN: | 1538-3881 |
| DOI: | 10.3847/1538-3881/ab1538 |