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Sources and acceleration efficiencies for energetic particles in the heliosphere

H Kucharek, E Möbius2006年Plasma Physics and Controlled FusionIF 2.2出版社

Shocks at solar wind stream interaction regions, coronal mass ejections and magnetospheric obstacles have long been known for their intimate link with particle acceleration. Much enhanced capabilities to determine mass and charge composition at interplanetary shocks with ACE and SOHO have enabled us to identify sources and acceleration processes for the energetic particles. Both solar wind and interstellar pickup ions are substantial sources for particle acceleration in corotating interaction regions and at coronal mass ejections driven shocks and that flare particles are re-accelerated. Suprathermal distributions, such as pickup ions and pre-existing flare populations are accelerated much more efficiently than particles out of the solar wind. Recent results of the termination shock crossing by Voyager I and the scientific goals of the upcoming IBEX mission will be discussed.

日本語訳

太陽風ストリーム相互作用領域、コロナ質量放出、および磁気圏障害物における衝撃波は、粒子加速との密接な関連が長らく知られている。ACEおよびSOHOによる惑星間衝撃波における質量・電荷組成の決定能力の大幅な向上により、高エネルギー粒子の起源と加速過程の特定が可能となった。太陽風と星間物質のピックアップイオンの両方が、共回転相互作用領域およびコロナ質量放出駆動衝撃波における粒子加速の主要な源であり、フレア粒子は再加速される。ピックアップイオンや既存のフレア粒子集団などの超熱的分布は、太陽風中の粒子よりもはるかに効率的に加速される。ボイジャー1号による終端衝撃波の横断の最近の結果と、今後のIBEXミッションの科学的目標について議論する。

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Energetic particles
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