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Microlensing Path Parameterization for Earth-like Exoplanet Detection around Solar-mass Stars

Abstract : We propose a new parameterization of the impact parameter u 0 and impact angle α for microlensing systems composed by an Earth-like exoplanet around a solar-mass star at 1 au. We present the caustic topology of such system, as well as the related light curves generated by using such a new parameterization. Based on the same density of points and accuracy of regular methods, we obtain results five times faster for discovering Earth-like exoplanets. In this big data revolution of photometric astronomy, our method will impact future missions like WFIRST (NASA) and Euclid (ESA) and their data pipelines, providing a rapid and deep detection of exoplanets for this specific class of microlensing event that might otherwise be lost.
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L. de Almeida, J. -D. Do Nascimento. Microlensing Path Parameterization for Earth-like Exoplanet Detection around Solar-mass Stars. The Astronomical Journal, 2018, 156, ⟨10.3847/1538-3881/aadc68⟩. ⟨insu-03744558⟩

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