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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >The effects of inhomogeneous proton-α drifts on the heating of the solar wind
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The effects of inhomogeneous proton-α drifts on the heating of the solar wind

机译：不均匀的影响质子-α的雪堆太阳风的加热

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摘要

Previous modeling studies have demonstrated that waves and super-Alfvénic drift can lead to perpendicular preferential heating of the α particles with respect to protons. Using 2.5-D hybrid model of the solar wind α-proton plasma, we study the effects of inhomogeneous (across the magnetic field) background streaming focusing on the fast solar wind. We explore the effects of an initial relative, inhomogeneous ion drift on the perpendicular ion heating and cooling and consider the effects of solar wind expansion. We study the spectrum of the magnetic fluctuations in the inhomogeneous background solar wind and demonstrate the generation of oblique waves and their effects on enhanced resonant anisotropic ion heating. The model reproduces the typical ion temperature anisotropy values seen in observations. Using our model, we find that inhomogeneous super-Alfvénic ion drift in the plasma generates significant power of oblique waves in the solar wind plasma, in addition to enhanced heating compared to the nondrifting populations. We demonstrate the effects of various inhomogeneity profiles and regions of the drift on the ion anisotropic heating in super-Alfvénic and near-Alfvénic drifts. We find that the cooling effect due to the solar wind expansion is not significant when super-Alfvénic drifts are considered.
机译：以前的建模研究已经证明,海浪和super-Alfvenic漂移可能导致垂直优惠α的加热粒子对质子。混合模型的太阳风α质子等离子体,我们研究非齐次的影响(在磁场)背景流媒体关注快速的太阳风。初始相对的,非离子漂移的离子加热和冷却和垂直考虑太阳风扩张的影响。研究磁的频谱波动在非均匀背景太阳风和演示斜波的生成和对共振增强各向异性的影响离子加热。在温度各向异性值观察。非齐次super-Alfvenic离子漂移等离子体产生斜的重要力量在太阳风等离子体波,除了增强了nondrifting加热相比人群。和地区的不同的不均匀性资料在离子各向异性热漂移super-Alfvenic near-Alfvenic飘。由于太阳风的冷却效果当super-Alfvenic扩张并不重要被认为是。

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