http://arxiv.org/abs/2211.13393
Up to date, only 13 firmly established triple microlensing events have been discovered, so the occurrence rates of microlensing two-planet systems and planets in binary systems are still uncertain. With the upcoming space-based microlensing surveys, hundreds of triple microlensing events will be detected. To provide clues for future observations and statistical analyses, we initiate a project to investigate the detectability of triple-lens systems with different configurations and observational setups. As the first step, in this work we develop the simulation software and investigate the detectability of a scaled Sun-Jupiter-Saturn system with the recently proposed microlensing telescope of the “Earth 2.0 (ET)” mission. We find that the detectability of the scaled Sun-Jupiter-Saturn analog is about 1%. In addition, the presence of the Jovian planet suppresses the detectability of the Saturn-like planet by $\sim $13% regardless of the adopted detection $\Delta\chi^2$ threshold. This suppression probability could be at the same level as the Poisson noise of future space-based statistical samples of triple-lenses, so it is inappropriate to treat each planet separately during detection efficiency calculations.
R. Kuang, W. Zang, S. Mao, et. al.
Mon, 28 Nov 22
24/93
Comments: 14 pages, 11 figures, submitted to MNRAS, comments welcome!
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