论文标题
火星周围太阳风湍流中不可压缩的能量级联速率的可变性
Variability of the Incompressible Energy Cascade Rate in Solar Wind Turbulence Around Mars
论文作者
论文摘要
我们介绍了关于火星周围太阳风中不可压缩能量级联速率的可变性的统计分析，利用了完全发育的湍流和超过五年的火星大气和挥发性（MAVEN）观察的确切关系。使用磁场和等离子体数据，我们计算原始太阳风中磁性水力学（MHD）尺度中的能量级联速率。根据我们的统计结果，我们得出结论，不可压缩的能量级联速率随着三个探索的火星年份中的每一年的增加而随着火星的地向上心距离的增加而降低。此外，我们表明，与延长的火星氢外层相关的质子回旋体波的存在在MHD尺度下对非线性能量级联没有显着影响。
We present a statistical analysis on the variability of the incompressible energy cascade rate in the solar wind around Mars, making use of an exact relation for fully developed turbulence and more than five years of Mars Atmosphere and Volatile EvolutioN (MAVEN) observations. Using magnetic field and plasma data, we compute the energy cascade rate in the magnetohydrodynamics (MHD) scales in the pristine solar wind. From our statistical results, we conclude that the incompressible energy cascade rate decreases as the Martian heliocentric distance increases, for each of the three explored Martian years. Moreover, we show that the presence of proton cyclotron waves, associated with the extended Martian hydrogen exosphere, do not have a significant effect in the nonlinear cascade of energy at the MHD scales.
