Candidate of the microlensing planet not toward the bulge

Makiko Ban  ✧  Astronomical Observatory of the University of Warsaw, Poland

More than a hundred exoplanets have been found using microlensing method. All of them except one (Fukui et al. 2019) were found towards the Galactic bulge. We report the second microlensing planet that is not seen towards the bulge: AT2021uey, which was alerted by ASAS-SN, ZTF, and Gaia. The ground-based surveys ASAS-SN and ZTF successfully observed an anomaly of the event whilst Gaia failed to detect the anomaly due to its low cadence. The anomaly indicates the existence of a gaseous planet beyond the snow line.

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