Illuminating Hot Jupiters in caustic crossing

Abstract

In recent years a large number of Hot Jupiters orbiting in a very close orbit around the parent stars have been explored with the transit and doppler effect methods. Here in this work we study the gravitational microlensing effect of a binary lens on a parent star with a Hot Jupiter revolving around it. Caustic crossing of the planet makes enhancements on the light curve of the parent star in which the signature of the planet can be detected by high precision photometric observations. We use the inverse ray shooting method with tree code algorithm to generate the combined light curve of the parent star and the planet. In order to investigate the probability of observing the planet signal, we do a Monte-Carlo simulation and obtain the observational optical depth of $\tau \sim 10^{-8}$. We show that about ten years observations of Galactic Bulge with a network of telescopes will enable us detecting about ten Hot Jupiter with this method. Finally we show that the observation of the microlensing event in infra-red band will increase the probability for detection of the exo-planets.

8 pages, 7 figures, accepted in MNRAS

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Cited by in corpus (8)

• Detection of Exoplanet as a Binary Source of Microlensing Events in WFIRST Survey
• Revealing Short-period Exoplanets and Brown Dwarfs in the Galactic Bulge using the Microlensing Xallarap Effect with the \textit{Nancy Grace Roman Space Telescope}
• Sensitivity to habitable planets in the \textit{Roman} microlensing survey
• Gravitational Microlensing Events as a Target for SETI project
• Microlensed Radio Emission from Exoplanets
• Improved Aberth-Ehrlich root-finding algorithm and its further application for Binary Microlensing
• Polarimetry microlensing of close-in planetary systems
• Variation of the stellar color in high-magnification and caustic-crossing microlensing events