论文标题
间歇性与近似太阳风中的电子加热的关联
Association of intermittency with electron heating in the near-Sun solar wind
论文作者
论文摘要
在近地环境中的几项研究表明，间歇性结构是能量耗散和颗粒能量的重要部位。最近在近似环境中采样的帕克太阳能探针（PSP）数据表明，质子加热集中在相干结构附近，这表明该地区的湍流级联反应局部加热质子。但是，电子在近似环境中是否表现出相似的行为尚不清楚。在这里，我们使用前七个轨道在太阳附近收集的PSP数据解决了这个问题。我们使用增量（PVI）技术的部分差异来识别相干结构。我们发现电子温度在较强的不连续性附近优先增强，尽管该关联比质子弱一些。我们的结果为“年轻”太阳风中电子的不均匀加热提供了强有力的支持，这与间歇性结构附近的湍流波动的耗散有关。
Several studies in the near-Earth environment show that intermittent structures are important sites of energy dissipation and particle energization. Recent Parker Solar Probe (PSP) data, sampled in the near-Sun environment, have shown that proton heating is concentrated near coherent structures, suggesting local heating of protons by turbulent cascade in this region. However, whether electrons exhibit similar behavior in the near-Sun environment is not clear. Here, we address this question using PSP data collected near the Sun during the first seven orbits. We use the partial variance of increments (PVI) technique to identify coherent structures. We find that electron temperature is preferentially enhanced near strong discontinuities, although the association is somewhat weaker than that with protons. Our results provide strong support for inhomogeneous heating of electrons in the "young" solar wind, associated with dissipation of turbulent fluctuations near intermittent structures.
