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arXiv 1909.09050physics.space-phastro-ph.SRphysics.plasm-ph
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行星际激波中电子能量分配:II。统计

Electron energy partition across interplanetary shocks: II. Statistics

Lynn B. Wilson, Li-Jen Chen, Shan Wang, Steven J. Schwartz, Drew L. Turner, Michael L. Stevens, Justin C. Kasper, Adnane Osmane, Damiano Caprioli, Stuart D. Bal… 展开作者

Lynn B. Wilson, Li-Jen Chen, Shan Wang, Steven J. Schwartz, Drew L. Turner, Michael L. Stevens, Justin C. Kasper, Adnane Osmane, Damiano Caprioli, Stuart D. Bale, Marc P. Pulupa, Chadi S. Salem, Katherine A. Goodrich

摘要:

本文对$Wind$航天器在1天文单位附近观测到的52次行星际激波的$\pm$ 2小时内的15,210次电子速度分布函数拟合进行了统计分析。这是三部分系列中的第二部分,介绍IP冲击附近的电子VDFs。密集,低能量的核心,纤细,热晕,和场对齐的束/strahl的电子速度矩统计是一个统计上显着的列表值说明了直方图和表格列表的参考和基线在未来的工作。在上游的束/strahl拟合结果是目前最接近的一个适当的参数化的束/strahl电子速度时刻在周围的太阳风。这项工作还将作为$Parker \ Solar \ Probe$和$Solar \ Orbiter$等任务的1 AU基线和参考。核心(晕)[束流/strahl]组件的密度、温度、β和温度各向异性中值,下标为$ec$($eh$)[ $eb$ ],所有拟合结果分别为$n{\scriptstyle_{ec(h)[b]}}$ $\sim$ 11.3(0.36)[0.17] $cm^{-3}$,$T{\scriptstyle_{ec(h)[b], tot}}$ $\sim$ 14.6(48.4)[40.2] PDMATHAMBMX,$β{\scriptstyle_{ec(h)[b], tot}}$ $\sim$ 0.93(0.11)[0.05]和$\mathcal{A}{\scriptstyle_{ec(h)[b]}}$ $\sim$ 0.98(1.03)[0.93]。论文I中公布了拟合方法和数据产品描述的细微差别,论文III中将显示对结果的详细分析。

英文摘要:

A statistical analysis of 15,210 electron velocity distribution function (VDF) fits, observed within $\pm$2 hours of 52 interplanetary (IP) shocks by the $Wind$ spacecraft near 1 AU, is presented. This is the second in a three-part series on electron VDFs near IP shocks. The electron velocity moment statistics for the dense, low energy core, tenuous, hot halo, and field-aligned beam/strahl are a statistically significant list of values illustrated with both histograms and tabular lists for reference and baselines in future work. The beam/strahl fit results in the upstream are currently the closest thing to a proper parameterization of the beam/strahl electron velocity moments in the ambient solar wind. This work will also serve as a 1 AU baseline and reference for missions like $Parker \ Solar \ Probe$ and $Solar \ Orbiter$. The median density, temperature, beta, and temperature anisotropy values for the core(halo)[beam/strahl] components, with subscripts $ec$($eh$)[$eb$], of all fit results respectively are $n{\scriptstyle_{ec(h)[b]}}$ $\sim$ 11.3(0.36)[0.17] $cm^{-3}$, $T{\scriptstyle_{ec(h)[b], tot}}$ $\sim$ 14.6(48.4)[40.2] $eV$, $β{\scriptstyle_{ec(h)[b], tot}}$ $\sim$ 0.93(0.11)[0.05], and $\mathcal{A}{\scriptstyle_{ec(h)[b]}}$ $\sim$ 0.98(1.03)[0.93]. The nuanced details of the fitting method and data product description were published in Paper I and the detailed analysis of the results will be shown in Paper III.

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。

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