Generation of By in Earth’s magnetotail with the effect of IMF By during southward interplanetary magnetic field

• Main Author: Lingjie Li
• Format: Article
• Language: English
• Published: AIP Publishing LLC 2021-04-01
• Series: AIP Advances
• Online Access: http://dx.doi.org/10.1063/5.0044279

Based on the three-dimensional compressible resistive MHD models, the Earth’s dipole magnetic field is employed to investigate IMF By penetration driven by the solar wind during southward interplanetary magnetic field (IMF) with uniform resistivity. It is found that the magnetic field By is built up in the central plasma sheet of the Earth’s magnetotail. When θ = 30° (where BIMFy = BIMF  sin θ), the magnetic field By in the plasma sheet is the strongest and even larger than the initial imposed BIMFy. In addition, BIMFy promotes the reconnection process of dayside magnetopause. With a further increase in θ, the reconnection rate of dayside magnetopause and the magnetic field By decrease, and the structure changes significantly. The results can be used to analyze the observed data of IMF By penetration.