最も内側の木星の磁気圏にある高エネルギー有電粒子
1H. M. Fischer, E. Pehlke, G. Wibberenz, Institut fur Kernphysik, Universitat Kiel, D-24118 Kiel, Germany. L. J. Lanzerotti, Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974, USA. J. D. Mihalov, NASA Ames Research Center, Moffett Field, CA 94035, USA.
Science (New York, N.Y.)
|May 10, 1996
まとめ
ガリレオガリレオはガリレオです.
科学分野:
- 惑星科学は惑星科学である.
- プラズマ物理学 プラズマ物理学
- 宇宙物理学 宇宙物理学
背景:
- 木星の磁気圏は,強烈な放射線帯によって特徴付けられています.
- エネルギー粒子は,惑星の磁気圏の動態において重要な役割を果たします.
研究 の 目的:
- 木星の内部放射領域における高エネルギー粒子のエネルギーと角分布を調査する.
- 木星の赤道放射線帯の放射的な範囲と境界を決定するために.
主な方法:
- ガリレオ探査機のエネルギー粒子調査装置を利用した.
- 測定された粒子エネルギーと角分布は,イオの近くから木星の大気圏への入り口まで.
主要な成果:
- エネルギーのある電子と陽子の非常に大きな流れが観測され,ピークは木星の半径 (RJ) 2.2 周りにありました.
- 木星の明るい塵のリングの外縁の近くで,粒子の有意な吸収が検出されました.
- 高エネルギーヘリウムイオン (62 MeV/核) の濃度の流動を測定し,1.5 RJでピークに達した.
- 1.35 RJで粒子の濃度の急激な減少を特定し,最も内側の放射線エッジを定義しました.
結論:
- 木星の内部の放射線領域は,激しいエネルギー粒子集団を示しています.
- 明るい塵のリングと1.35 RJの境界線は,粒子の分布に大きく影響し,放射線帯の内縁を定義する.
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