MagAO Observations of the binary microlens OGLE-2014-BLG-1050 prefer the higher-mass solution
AffiliationSteward Observatory, University of Arizona
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PublisherAmerican Astronomical Society
CitationXie, X., Dong, S., Zhu, W., Gould, A., Udalski, A., Beaulieu, J. P., ... & Yee, J. C. (2021). MagAO Observations of the Binary Microlens OGLE-2014-BLG-1050 Prefer the Higher-mass Solution. The Astronomical Journal, 161(3), 113.
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AbstractWe report adaptive optics (AO) follow-up imaging of OGLE-2014-BLG-1050, which is the second binary microlensing event with space-based parallax measurements. The degeneracy in microlens parallax πEled to two sets of solutions, either a ~ (0.9, 0.35)M⊙binary at ~3.5 kpc or a ~(0.2, 0.07)M⊙binary at ~1.1 kpc. We measure the flux blended with the microlensed source by conducting Magellan AO observations, and find that the blending is consistent with the predicted lens flux from the higher-mass solution. From the combination of the AO flux measurement together with previous lensing constraints, it is estimated that the lens system consists of a -1.05+0.08-0.07primary and a 0.38+0.07-0.06M⊙secondary at - 3.43+0.19-0.21kpc. © 2021 Institute of Physics Publishing. All rights reserved.
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