Electron plasma oscillations upstream of the solar wind termination shock

被引:66
作者
Gurnett, DA [1 ]
Kurth, WS [1 ]
机构
[1] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA
关键词
D O I
10.1126/science.1117425
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Electron plasma oscillations have been detected upstream of the solar wind termination shock by the plasma wave instrument on the Voyager 1 spacecraft. These waves were first observed on 11 February 2004, at a heliocentric radial distance of 91.0 astronomical units, and continued sporadically with a gradually increasing occurrence rate for nearly a year. The last event occurred on 15 December 2004, at 94.1 astronomical units, just before the spacecraft crossed the termination shock. Since then, no further electron plasma oscillations have been observed, consistent with the spacecraft having crossed the termination shock into the heliosheath.
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页码:2025 / 2027
页数:3
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