Wednesday, October 16th, 2013
Dr. Konstantin Batygin
Institute for Theory and Computation
Harvard - Smithsonian Center for Astrophysics
Disk-Driven Migration in Hot Jupiters
The existence of gaseous giant planets whose orbits lie in close proximity to their host stars (“hot Jupiters") can naturally be accounted for by protoplanety disk-driven (type-II) migration, associated with viscous evolution of the nebulae. Recently, observations of this effect during planetary transits have revealed that a considerable fraction of detected hot Jupiters reside on orbits that are misaligned with respect to the spin-axes of their host stars. This observational fact has cast significant doubts on the importance of disk-driven migration as a mechanism for production of hot Jupiters, thereby reestablishing the origins of close-in planetary orbits as an open question. Here we show that spin-orbit misalignment is a natural consequence of disk-driven migration.