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arXiv physics/0602179physics.space-ph
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离子回旋频率范围内的太阳风电场

Solar Wind Electric Fields in the Ion Cyclotron Frequency Range

P. J. Kellogg, S. D. Bale, F. S. Mozer, T. S. Horbury, H. Reme

摘要:

测量的波动的电场的频率范围从一个Hz的分数到12.5 Hz,并校正为洛伦兹变换的磁波动,给出电场在等离子体框架。电场足够大,可以在质子的离子回旋频率附近的区域中对太阳风的离子提供主导力,该力大于由于磁波动产生的力。它们提供了足够的速度空间扩散或加热,以抵消膨胀的太阳风中的磁矩守恒,从而保持几乎各向同性的速度分布。

英文摘要:

Measurements of fluctuations of electric fields in the frequency range from a fraction of one Hz to 12.5 Hz are presented, and corrected for the Lorentz transformation of magnetic fluctuations to give the electric fields in the plasma frame. The electric fields are large enough to provide the dominant force on the ions of the solar wind in the region near the ion cyclotron frequency of protons, larger than the force due to magnetic fluctuations. They provide sufficient velocity space diffusion or heating to counteract conservation of magnetic moment in the expanding solar wind to maintain nearly isotropic velocity distributions.

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