Lens Masses and Distances from Microlens Parallax and Flux
Abstract
I present a novel method for measuring lens masses for microlensing events. By combining a measured lens flux with the microlens parallax vector piE, it is possible to derive the mass of the lens system without knowing the angular size of the Einstein ring, thetaE. This enables mass and distance measurements for single, luminous lenses, as well as binary and planetary lenses without caustic crossings. I discuss applications of this method in the contexts of the Spitzer, Kepler, and WFIRST microlensing missions.
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