Microlensing Search for Planets with Two Simultaneously Rising Suns

Abstract

Among more than 200 extrasolar planet candidates discovered to date, there is no known planet orbiting around normal binary stars. In this paper, we demonstrate that microlensing is a technique that can detect such planets. Microlensing discoveries of these planets are possible because the planet and host binary stars produce perturbations at a common region around center of mass of the binary stars and thus the signatures of both planet and binary can be detected in the light curves of high-magnification microlensing events. The ranges of the planetary and binary separations of systems for optimal detection vary depending on the planet mass. For a Jupiter-mass planet, we find that high detection efficiency is expected for planets located in the range of $\sim$ 1 AU -- 5 AU from the binary stars which are separated by $\sim$ 0.15 AU -- 0.5 AU

4 pages, 4 figures

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Cited by in corpus (10)

• Critical Curves and Caustics of Triple-lens Models
• OGLE-2016-BLG-0613LABb: A Microlensing Planet in a Binary System
• Caustic Structures and Detectability of Circumbinary Planets in Microlensing
• Detection and Characterization of Planets in Binary and Multiple Systems
• Ice Lines in Circumbinary Protoplanetary Disks
• Revisiting the proposed circumbinary multi-planet system NSVS14256825
• Triple-lens Gravitational Microlensing: Critical Curves for Arbitrary Spatial Configuration
• Image-plane Analysis of n-point-mass Lens Critical Curves and Caustics
• OGLE-2019-BLG-0304: Competing Interpretations between a Planet-binary Model and a Binary-source + Binary-lens model
• The Importance of Binary Gravitational Microlensing Events Through High-Magnification Channel