OGLE-2018-BLG-0022

• Verfasst von: Street, Rachel [VerfasserIn]
• Verfasst von: Tsapras, Yiannis [VerfasserIn]
• Verfasst von: Hundertmark, Markus [VerfasserIn]
• Verfasst von: Wambsganß, Joachim [VerfasserIn]
• Titel: OGLE-2018-BLG-0022
• Titelzusatz: a nearby M-dwarf binary
• Verf.angabe: 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
• E-Jahr: 2019
• Jahr: 2019 May 7
• Umfang: 11 S.
• Fussnoten: Gesehen am 04.06.2019
• Titel Quelle: Enthalten in: The astronomical journal
• Ort Quelle: London : Institute of Physics Publ., 1998
• Jahr Quelle: 2019
• Band/Heft Quelle: 157(2019,6) Artikel-Nummer 215, 11 Seiten
• ISSN Quelle: 1538-3881
• DOI: doi:10.3847/1538-3881/ab1538
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1666661090

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.