http://arxiv.org/abs/1403.2134
Based on its high proper motion $\mu=12.5\pm 1\,\masyr$, MOA-2013-BLG-220Lb is the best candidate to date for a microlensing planet with a verifiable brown dwarf host. This candidacy can be partially tested immediately and more fully tested by $\sim 2021$, when the source and lens will have separated sufficiently to be resolved in high-resolution images even if the lens is at the bottom of the main sequence, and so extremely faint, $H\sim 24$. The planet-star mass ratio is $q=3.01\pm 0.02\times 10^{-3}$. The planet could have been detected and characterized purely with follow-up data. The potential to completely characterize planetary events from followup data has far-reaching implications for microlensing surveys, both current and into the LSST era.
J. Yee, C. Han, A. Gould, et. al.
Tue, 11 Mar 14
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