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MagAO Observations of the binary microlens OGLE-2014-BLG-1050 prefer the higher-mass solution

Citation

Xie, X and Dong, S and Zhu, W and Gould, A and Udalski, A and Beaulieu, J-P and Close, LM and Males, JR and Marquette, JB and Morzinski, KM and Pogge, RW and Yee, JC, MagAO Observations of the binary microlens OGLE-2014-BLG-1050 prefer the higher-mass solution, Astronomical Journal, 161, (3) Article 113. ISSN 0004-6256 (2021) [Refereed Article]


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DOI: doi:10.3847/1538-3881/abd6c0

Abstract

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.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Beaulieu, J-P (Dr Jean-Philippe Beaulieu)
ID Code:152302
Year Published:2021
Deposited By:Plant Science
Deposited On:2022-08-16
Last Modified:2022-08-16
Downloads:0

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