Effects of Jupiter's formation and migration: the Jovian Early Bombardment

Physics

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Scientific paper

The first phase in the lifetime of the Solar System is that of the Solar Nebula, when the Solar System is constituted by a circumsolar disk of gas and dust particles where planetesimals and planetary embryos are forming. The giant planets should have formed during this phase, since the nebular gas represents the source material for their gaseous envelopes. Here we report the results of our investigation of the effects of Jupiter's formation on the planetesimals populating the Solar Nebula using Vesta and Ceres as case studies. Our results show that the formation of Jupiter triggered a brief yet intense phase of bombardment, which we called the Jovian Early Bombardment and whose intensity varies with the extent and the timescale of Jupiter's migration. The data that the Dawn mission will supply on Vesta and Ceres will allow us to test the Jovian Early Bombardment hypothesis and possibly gather information on the formation and the early dynamical evolution of Jupiter.

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