Mean motion resonances, gas drag, and supersonic planetesimals in the solar nebula

摘要: We examine the orbital evolution of planetesimals under influence Jupiter's perturbations and nebular gas drag, assumption that persisted in asteroid region for some time after Jupiter attained its final mass. Two distinct mechanisms, associated with 2 : 1 3 mean motion resonances, can excite eccentricities to high values, despite damping effect drag. If eccentricity was comparable present value, be temporarily trapped resonance. Bodies crossing resonance enter a phase space overlapping high-order resonances. Both mechanisms produce greater than 0.5 asteroid-sized planetesimals. The combination resonant drag causes secular decay semimajor axes, resulting migration bodies from outer inner belt. Inclinations remain low, implying significant collisional during this migration. Velocities relative are highly supersonic; these would have been source shock waves solar nebula.