Ion cyclotron waves, instabilities and solar wind heating
Ion cyclotron waves, instabilities and solar wind heating
复制标题
离子回旋波、不稳定性和太阳风加热
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
S. Habbal
中科院分区：
文献类型：
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作者：
Xing Li;S. Habbal
研究了α粒子对离子回旋波色散关系的影响及其对太阳风等离子体加热的影响。α粒子的存在会极大地改变离子回旋波的色散关系，并显著影响离子回旋波加热太阳风等离子体的方式。我们发现，在行星际空间中，离子回旋波的光谱对太阳风质子和其他离子的热各向异性的影响是不同的：当α粒子的速度为uα>0.5vA时，质子和α粒子都具有热各向异性T⊥/T∥>1时，离子回旋波在垂直于磁场的方向上加热质子，在平行方向上冷却它们，而对α粒子施加相反的作用。
The effect of alpha particles on the dispersion relation of ion cyclotron waves and its influence on the heating of the solar wind plasma are investigated. The presence of alpha particles can dramatically change the dispersion relation of ion cyclotron waves, and significantly influence the way that ion cyclotron waves heat the solar wind plasma. We find that a spectrum of ion cyclotron waves affects the thermal anisotropy of the solar wind protons and other ions differently in interplanetary space: When alpha particles have a speed uα>0.5vA, and both protons and alpha particles have a thermal anisotropy T⊥/T∥>1, ion cyclotron waves heat protons in the direction perpendicular to the magnetic field, cool them in the parallel direction, and exert the opposite effect on alpha particles.