Characterizing microlensing planetary system OGLE-2014-BLG-0676Lb with adaptive optics imaging* *This paper includes data gathered with the 6.5m Magellan Clay Telescope at Las Campanas Observatory, Chile.

Abstract

We constrain the host-star flux of the microlensing planet OGLE-2014-BLG-0676Lb using adaptive optics (AO) images taken by the Magellan and Keck telescopes. We measure the flux of the light blended with the microlensed source to be K = 16.79 ± 0.04 mag and J = 17.76 ± 0.03 mag. Assuming that the blend is the lens star, we find that the host is a star at a distance of kpc, where the relatively large uncertainty in angular Einstein radius measurement is the major source of uncertainty. With mass of , the planet is likely a “super Jupiter” at a projected separation of AU, and a degenerate model yields a similar at a closer separation of AU. Our estimates are consistent with the previous Bayesian analysis based on a Galactic model. OGLE-2014-BLG-0676Lb belongs to a sample of planets discovered in a “second-generation” planetary microlensing survey and we attempt to systematically constrain host properties of this sample with high-resolution imaging to study the distribution of planets.