Out-of-plane Parallel Current in the Diffusion Regions: The Interaction Between Diffusion Region Systems and their Impact on the Outer EDR
arxiv(2024)
摘要
Dayside magnetic reconnection allows for the transfer of the solar wind's
energy into Earth's magnetosphere. This process takes place in electron
diffusion regions (EDRs) embedded in ion diffusion regions (IDRs), which form
in the magnetopause boundary's current sheet. A significant out-of-plane
parallel current contribution in the diffusion regions was reported in Beedle
et al. 2023. In order to understand the underlying structure of this parallel
current, we compared EDR statistical results with a 2.5D Particle-In Cell (PIC)
simulation. From this comparison, we identified out-of-plane parallel current
signatures as defining features of the outer EDR and IDR. This significant
out-of-plane parallel current indicates the interaction of the IDR and EDR
systems, and provides implications for not only understanding energy
dissipation in the diffusion regions, but also determining the location of the
outer EDR.
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