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Nonlinear electromagnetic waves and spherical arc-polarized waves in space plasmas

Bruce T Tsurutani, Christian M Ho, John K Arballo, Gurbax S Lakhina, Karl-Heinz Glassmeier, Fritz M Neubauer1997年Plasma Physics and Controlled FusionIF 2.2出版社

We review observations of nonlinear plasma waves detected by interplanetary spacecraft. For this paper we will focus primarily on the phase-steepened properties of such waves. Plasma waves at comet Giacobini - Zinner measured by the international cometary explorer (ICE), at comets Halley and Grigg - Skjellerup measured by Giotto, and interplanetary Alfvén waves measured by Ulysses, will be discussed and intercompared. Owing to the page limitations of this paper we will keep the cometary wave discussion brief (but references for the interested reader will be provided), and we will focus more on the recent Ulysses observations of phase-steepened Alfvén waves. For the latter, classical `interplanetary rotational discontinuities' are explained as phase-steepened edges of Alfvén waves. Both the Alfvén waves and their phase-steepened edges will be shown to be arc-polarized. A method of determination of the direction of propagation of these waves will be discussed.

日本語訳

我々は、惑星間宇宙機によって検出された非線形プラズマ波の観測について概説する。本論文では、そのような波の位相急峻化特性に主に焦点を当てる。国際彗星探査機(ICE)によってジアコビニ・ツィンナー彗星で測定されたプラズマ波、ジオットによってハレー彗星およびグリッグ・スケジェレラップ彗星で測定されたプラズマ波、ならびにユリシーズによって測定された惑星間アルフヴェン波について、議論し比較する。本論文の頁数の制限により、彗星における波動の議論は簡潔に留める(ただし、関心のある読者のための参考文献は提供する)。そして、ユリシーズによる位相急峻化アルフヴェン波の最近の観測に重点を置く。後者については、古典的な「惑星間回転不連続」は、アルフヴェン波の位相急峻化端として説明される。アルフヴェン波とその位相急峻化端の両方が、円弧偏波であることを示す。これらの波の伝播方向の決定方法について議論する。

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