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KMT-2019-BLG-1715: planetary microlensing event with three lens masses and two source stars
- Publication Year :
- 2021
-
Abstract
- We investigate the gravitational microlensing event KMT-2019-BLG-1715, of which light curve shows two short-term anomalies from a caustic-crossing binary-lensing light curve: one with a large deviation and the other with a small deviation. We identify five pairs of solutions, in which the anomalies are explained by adding an extra lens or source component in addition to the base binary-lens model. We resolve the degeneracies by applying a method, in which the measured flux ratio between the first and second source stars is compared with the flux ratio deduced from the ratio of the source radii. Applying this method leaves a single pair of viable solutions, in both of which the major anomaly is generated by a planetary-mass third body of the lens, and the minor anomaly is generated by a faint second source. A Bayesian analysis indicates that the lens comprises three masses: a planet-mass object with $\sim 2.6~M_{\rm J}$ and binary stars of K and M dwarfs lying in the galactic disk. We point out the possibility that the lens is the blend, and this can be verified by conducting high-resolution followup imaging for the resolution of the lens from the source.<br />Comment: 11 pages, 13 figures, 7 tables
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2104.00293
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.3847/1538-3881/abf4d0