The Mhd Method To Simulate The Moon In The Solar Wind Disturbances

Two-dimensional ideal MHD simulation of the interaction between the solar wind and the Moon reveals the particle and magnetic field distribution in the lunar wake. The results show that the density of the solar wind falls dramatically and the interplanetary magnetic field (IMF) increases in the umbra of the Moon. When the IMF is parallel to the direction of the solar wind velocity, the wake is very long; when the IMF is normal to the velocity of the solar wind, the wake is shorter; if the IMF is oblique to the solar wind velocity, the wake is no longer symmetric with respect to the direction of the solar wind velocity. On the other hand, if the IMF keeps constant, higher solar wind Mach number results in longer wake. In a conclusion, our simulation gives similar results with the previous theoretical models and observations, that is,the direction of IMF and the velocity of the solar wind are two main factors controlling the structure of the lunar wake.