異なるプラズマ集団と構造が木星の磁気尾にある

D J McComas¹, F Allegrini, F Bagenal

¹Southwest Research Institute, 6220 Culebra Road, San Antonio, TX 78238, USA. dmccomas@swri.edu

Science (New York, N.Y.)

|October 13, 2007

まとめ

"ニュー・ホライゾンズ"ミッションは木星を調査した.

科学分野:

惑星科学は惑星科学である.
宇宙物理学宇宙物理学
プラズマ物理学プラズマ物理学

背景:

木星の磁気尾は,太陽系の最大の構造である.
これは,木星系からのイオン損失の重要な地域です.
その動態を理解することは,惑星科学にとって極めて重要です.

研究の目的:

木星の磁気尾の中のプラズマ集団と構造を調べるために.
磁気尾のイオン進化と変動性を分析する.
ニュー・ホライゾンズによって観測されたプラズマ現象の多様性を特徴付ける.

主な方法:

ニュー・ホライゾンズ宇宙船によるイン・シトゥ測定.
磁気尾の横断は,2500の木星の半径 (R(J)) を超える距離まで行われます.
プラズマ流量,エネルギー,構造の変化の分析.

主要な成果:

様々な種類のプラズマ集団と構造を観察した.
プラズマディスクから尾の流れの遅さへのイオンの進化を特定した.
準周期的な流量変化と流速の変動が検出され,プラズモイドと関連している可能性がある.

結論:

木星の磁気尾は,重要なプラズマ構造とダイナミックな進化を示しています.
イオン集団は,イオと木星のイオン圏の両方から発生します.
磁気尾の変動は,プラズモイドダイナミクスなどの現象によって引き起こされる可能性があります.

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