4:30 PM - 4:45 PM
[PPS06-23] IN-SITU FORMATION OF THE URANIAN SATELLITES FROM WIDE DEBRIS DISK FORMED BY GIANT IMPACT
Keywords:Satellite formation, Uranus, Giant impact
In this study, we modeled wide debris disks of solids with several conditions, and performed $N$-body simulations to investigate the in-situ satellite formation from the wide debris disks to constrain the parameters of debris disks for the in-situ satellite formation. We found that the five major satellites formed around the current orbits from wide debris disks with several times the total satellite mass. Although one or two large satellites usually form inside the current orbits of the major satellites, such satellites would migrate inward due to the tidal torque from the planet and finally be disrupted by the planetary tides or fall onto the planet over several hundred million years. We also propose that the Uranian rings could form from the disrupted satellites and the inner regular satellites could form by use of the ring materials.