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2009•AIP conference proceedingsRequires access

”Heart-shaped” plasmoid observed in the distant magnetotail

M. Hirai, Takeshi Kuroda, Shigeru Ida, M. Hoshino, M. Hirahara, Yoshizumi Miyoshi, Naoki Terada, Toshifumi Mukai, Iku Shinohara

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Abstract

We discovered plasmoids which have the “heart‐shape” structure in the distant magnetotail by using the Geotail data. We also showed the existence of intermediate and slow shocks in the interface of heart shape structure. The plasma sheet density just before the heart‐shaped plasmoid passage appeared to be larger than that of the averaged case. These results support the idea that the plasmoid generated in the near‐Earth neutral line (NENL) may evolve into the heart‐shape due to the nonuniform MHD velocities in the plasma sheet.

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What this paper is about

We discovered plasmoids which have the “heart‐shape” structure in the distant magnetotail by using the Geotail data. We also showed the existence of intermediate and slow shocks in the interface of heart shape structure. The plasma sheet density just before the heart‐shaped plasmoid passage appeared to be larger than that of the averaged case. These results support the idea that the plasmoid generated in the near‐Earth neutral line (NENL) may evolve into the heart‐shape due to the nonuniform MHD velocities in the plasma sheet.

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Available abstract

We discovered plasmoids which have the “heart‐shape” structure in the distant magnetotail by using the Geotail data. We also showed the existence of intermediate and slow shocks in the interface of heart shape structure. The plasma sheet density just before the heart‐shaped plasmoid passage appeared to be larger than that of the averaged case. These results support the idea that the plasmoid generated in the near‐Earth neutral line (NENL) may evolve into the heart‐shape due to the nonuniform MHD velocities in the plasma sheet.

Key concepts: Plasmoid, Physics, Plasma sheet, Plasma, Magnetohydrodynamics, Atomic physics, Magnetic reconnection, Magnetosphere

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