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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >On Alfvénic Slow Wind: A Journey From the Earth Back to the Sun
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On Alfvénic Slow Wind: A Journey From the Earth Back to the Sun

机译：Alfvenic慢风:地球的旅程回到太阳

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摘要

Comparative studies of fast and slow solar wind streams performed over the past decades have illustrated several differences between the plasma regimes for these different flows, examples including features such as temperatures, particle distribution function anisotropies, and the nature of the embedded turbulence, specifically the Alfvénicity of the fluctuations. Though this two-state classification of the solar wind primarily based on flow speed has been widely adopted, more in depth studies have found that slow solar wind should be further categorized, flow speed not being a sufficient descriptor of the plasma state. Within this framework, slow solar wind streams with a strong Alfvénic character have been identified and characterized, showing that in many ways they resemble fast solar wind. The similarities between fast and slow Alfvénic wind regimes have been explained in terms of a similar solar origin, with the latter corresponding to slow winds emanating from rapidly diverging low-latitude small coronal holes. The aim of this review is to describe the state of art of our understanding of Alfvénic slow solar wind streams. The results presented cover observations performed at different heliocentric distances spanning from Wind at L1 to Helios and Parker Solar Probe in the inner heliosphere, as well as a discussion of their source regions.
机译：快和慢太阳风的比较研究流在过去的几十年中已经执行介绍了几个差异等离子体制为这些不同的流,例子包括功能,如温度,粒子分布函数各向异性嵌入式湍流的本质,专门的Alfvenicity波动。尽管这两个国家太阳能的分类风主要基于流的速度广泛采用,更深入的研究发现应该进一步,缓慢的太阳风分类,流动速度不是充分的描述符的等离子体状态。框架,缓慢的太阳风流强已确定和Alfvenic字符特征,这表明他们在许多方面像快太阳风。快与慢之间Alfvenic风政权被解释的一个类似的太阳能起源,后者对应于缓慢风来自迅速发散低纬度小日冕洞。审查是描述我们的艺术的状态理解Alfvenic缓慢的太阳风流。表现在不同的日心距离从风在L1赫利俄斯和帕克太阳探测器的日球层,以及讨论他们的来源地区。

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