Abstract
Many works have done about migration of Neptune, but its basic mechanism still uncertain. Their model needs heavy planetesimal disk so except special case, amount of planetesimal remains in the system . In our model, we investigate about detail process of Jupiter's scattering. Jupiter scatters only highly eccentric planetesimals, so planetesimal gives larger angular momentum than other models. and it leads us that Neptune can migrate in low mass disk. In addition, Jupiter's scattering are occurred at almost same place in a-e plane, we can easily estimate the exchanging angular momentum. We'll show about formulation of migration according to above explanation.
