[PAE20-P02] Impact of resonance trapping of planetesimals during planetary migration on metallicities of close-in gas giants
Keywords:Planet Formation, Heavy Elements, Planet Migration, Resonance Trapping
According to studies estimating the amount of planetesimals captured by a growing protoplanet, the amount of heavy elements captured in this process is at most ten Earth masses. The estimated amount is not large enough to explain the heavy element excess of the gas giant planets shown in the above studies. In order to solve this problem, this study investigates the capture of planetesimals during the planet migration process, which is different from the growth process investigated before. In particular, we focus on the capture of planetesimals by the mean motion resonances of a migrating gas giant planet (resonance trapping). Performing orbital calculations of planetesimals, we quantitatively discuss the effect of the resonance trapping on the capture of planetesimals by a migrating gas giant planet.