论文标题
火星周围的太阳风湍流：能量级联速率与质子回旋体的关系
Solar Wind Turbulence Around Mars: Relation Between The Energy Cascade Rate And The Proton Cyclotron Waves Activity
论文作者
论文摘要
使用MAVEN观测值和MHD湍流得出的精确关系，对磁流失动力（MHD）量表的不可压缩能量级联速率进行了首次估计。对于具有质子回旋波（PCW）活性的事件计算的能量级联速率是在Maven在太阳风中，没有与弓冲击的磁连接的时间间隔。结果表明，当血浆中存在PCW时，在MHD尺度上的非线性能量级联对。对湍流波动的归一化跨螺旋性和残余能量的分析表明，在大多数情况下，在磁优势方面存在Alfvénic和非alfvénic波动。
The first estimation of the incompressible energy cascade rate at magnetohydrodynamic (MHD) scales is obtained in the plasma upstream of the Martian bow shock, using MAVEN observations and an exact relation derived for MHD turbulence. The energy cascade rate is computed for events with and without proton cyclotron wave (PCW) activity, for time intervals when MAVEN was in the solar wind with no magnetic connection to the bow shock. It is shown that the nonlinear cascade of energy at the MHD scales is slightly amplified when PCWs are present in the plasma. The analysis of the normalized cross helicity and residual energy for the turbulent fluctuations shows the presence of Alfvénic and non-Alfvénic fluctuations in a magnetic dominant regime for the majority of the cases.
