Yuri Fujii (U. Nagoya)

Formation pathways for systems of regular moons
When Mar 14, 2019 from 02:30 PM to 03:30 PM
  • Colloquium
Where SH Lecture Hall
Add event to calendar vCal / iCal

During the formation phase of gas giants, a circumplanetary gaseous disk forms around the planet. This is important not only for mass supply to the gas giant planet, but also for the formation of regular satellites such as the Galilean moons of the Jupiter system. In the absence of significant angular momentum transport, continuous mass supply from the parental protoplanetary disk leads to the formation of a massive circumplanetary disk. We have developed an evolutionary model for this scenario and have estimated the orbital evolution of moons within the disk. In a certain temperature range, we find that inward migration of a moon can be stopped at disk structures caused by opacity transitions. We also find that the second and third migrating moons can be captured in mean motion resonances. In this way, a compact system in so-called Laplace resonance, can be formed in our disk models. These are quite similar to Io, Europa & Ganymede, the inner three of the four Galilean satellites around Jupiter.