太阳风离子的温度各向异性和差异流--与横向涨落的相关
Temperature anisotropy and differential streaming of solar wind ions -- Correlations with transverse fluctuations
摘要：
我们研究的相关性的温度比（这是一个指标垂直离子加热）和α粒子的差分流与功率的横向波动，具有波数在0.01和0.1之间（归一化为$k_p=1/l_p$，其中$l_p$是质子惯性长度）。我们发现，当相对波功率增加时，归一化微分离子速度$V_{αp}/V_\mathrm{A}$（其中$V_\mathrm{A}$是Alfvén速度）和质子温度各向异性$T_{\perp p}/T_{\parallel p}$都增加。此外，如果归一化的微分离子速度保持在0.5以下，则α粒子温度各向异性$T_{\perp α}/T_{\parallel α}$与横向波动的相对功率正相关。然而，如果$V_{αp}/V_\mathrm{A}$高于0.6，则α粒子温度各向异性倾向于变得更低，并且尽管存在相对高振幅的横向波动，但仍达到低于1的均匀值。我们的研究结果似乎是一致的预期从动力学理论的共振相互作用的离子与阿尔文/离子回旋波和由此产生的波耗散。
英文摘要：
We study correlations of the temperature ratio (which is an indicator for perpendicular ion heating) and the differential flow of the alpha particles with the power of transverse fluctuations that have wave numbers between 0.01 and 0.1 (normalized to $k_p=1/l_p$, where $l_p$ is the proton inertial length). We found that both the normalized differential ion speed, $V_{αp}/V_\mathrm{A}$ (where $V_\mathrm{A}$ is the Alfvén speed) and the proton temperature anisotropy, $T_{\perp p}/T_{\parallel p}$, increase when the relative wave power is growing. Furthermore, if the normalized differential ion speed stays below 0.5, the alpha-particle temperature anisotropy, $T_{\perp α}/T_{\parallel α}$, correlates positively with the relative power of the transverse fluctuations. However, if $V_{αp}/V_\mathrm{A}$ is higher than 0.6, then the alpha-particle temperature anisotropy tends to become lower and attain even values below unity despite the presence of transverse fluctuations of relatively high amplitudes. Our findings appear to be consistent with the expectations from kinetic theory for the resonant interaction of the ions with Alfvén/ion-cyclotron waves and the resulting wave dissipation.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
