Speaker
Description
The James Webb Space Telescope (JWST) has revealed that free-floating planetary-mass objects (FFPMOs) often host substantial dusty disks. A key unanswered question is whether these objects formed in isolation or were dynamically ejected from planetary systems. We test the ejection hypothesis with 3D hydrodynamical simulations of a giant planet, hosting a circumplanetary disk (CPD), ejected via a stellar flyby. We find that the ejection process severely truncates the disk, leaving a remnant that is significantly smaller and less massive than disks around isolated objects. These results provide the first quantitative predictions for disks around ejected planets, creating a critical theoretical framework for interpreting the origin of FFPMOs with JWST.
