Numerical calculations are performed based on a set of equations that describe the non-steady, nonlinear interactions between a moving body in space and plasma. The results show that density cavitons and potential solitons are formed owing to modulational instability if the envelope of the high-frequency modulational field is sufficiently intense.
1.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Jiang Xi Normal Univ, Dept Phys, Nanchang 330027, Peoples R China 3.Nanjing Normal Univ, Dept Phys, Nanjing 210008, Peoples R China
