Stellar Scattering and the Formation of Hot-Jupiters in Binary Systems

Understand

Hot Jupiters (HJs) are usually defined as giant Jovian-size planets with orbital periods $P \le 10$ days.

• Although they lie close to the star, several have finite eccentricities and significant misalignment angle with respect to the stellar equator.
• Two mechanisms have been proposed to explain the excited and misaligned sub-population of HJs: Lidov-Kozai migration and planet-planet scattering.
• Although both are based on completely different dynamical phenomena, they appear to be equally effective in generating hot planets.