[P-EM34_2PO1] Plasma Astrophysics: interstellar/interplanetary space, magnetosphere

[PEM34-P02_2] Hybrid simulations of the interaction between the solar wind and the ion scale magnetosphere

*Masao NAKAMURA¹ (1.Osaka Prefecture University)

Keywords:Ion scale magnetosphere, Interaction between solar wind and mini-magnetosphere, 3D hybrid simulation

The interaction between the solar wind and the ion scale magnetosphere with a dipole magnetic field is investigated by a three-dimensional hybrid simulation. In the present study, the ion scale magnetosphere has a dayside stand-off distance which is several to a hundred times larger than the ion Larmor radius of the solar wind proton in the magnetic field strength at the dayside magnetopause boundary. The hybrid simulation treats the ions as kinetic super particles via particle-in-cell method and the electrons as a massless fluid. In the interaction between the solar wind and the magnetosphere, the interplanetary magnetic field (IMF) condition controls not only the reconnection regions but also the subsolar sheath flow due to the ion kinetic effects. Those influence the structures of the bow shock and the magnetopause boundary layer. We will also discuss the momentum transfer process from the solar wind into the magnetosphere and to the magnetized object.