Daniel Fabrycky (University of Chicago) -Exoplanets Migrating: Resonant Chains and Circum-Binary Planets

Planet formation has proven to be a robust side-effect of star formation, via the high occurrence rate of exoplanets. To learn more about this process, it is instructive to find and study planets in dynamical architectures that are naively surprising. I detail research on two such settings — (a) period resonance among multiple planets in the same system and (b) planets orbiting exterior to binary stars. In both cases, the emerging properties of the population help us understand how planets interact with, and migrate within, the disks in which they form. Current work is (a) showing how the resonant chains might disrupt, giving rise to more common architectures, and (b) detecting circumbinary planets by their gravitational perturbations rather than their transits.