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MagAO Observations of the binary microlens OGLE-2014-BLG-1050 prefer the higher-mass solution
We 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 πE led 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+0.08-0.07 M⊙ primary and a 0.38 +0.07-0.06M⊙ secondary at 3.43 +0.19-0.21 kpc.
Publication titleAstronomical Journal
Department/SchoolSchool of Natural Sciences
PublisherUniv Chicago Press
Place of publication1427 E 60Th St, Chicago, USA, Il, 60637-2954
Rights statement© 2021. The American Astronomical Society. All rights reserved