齐兆辉^1,2,,
刘勇^1,,,
刘若炎^1,2
1. 中国科学院国家空间科学中心 空间天气学国家重点实验室, 北京 100190
2. 中国科学院大学, 北京 100049

基金项目: 国家自然科学基金(41674173)及国家重点实验室专项基金资助


详细信息

作者简介: 齐兆辉, 男, 博士研究生, 方向为行星际太阳风.E-mail: zhqi@spaceweather.ac.cn

通讯作者: 刘勇, 男, 理学博士, 研究员, 主要从事电离层物理、行星际太阳风等方面研究.E-mail: liuyong@spaceweather.ac.cn

中图分类号: P353

收稿日期:2021-02-06
修回日期:2021-04-28
上线日期:2021-11-10

The small coronal hole solar wind and Alfvén wave within the slow solar wind

QI ZhaoHui^1,2,,
LIU Yong^1,,,
LIU RuoYan^1,2
1. State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China
2. University of Chinese Academy of Sciences, Beijing 100049, China


More Information

Corresponding author: LIU Yong,E-mail:liuyong@spaceweather.ac.cn

MSC: P353

--> Received Date: 06 February 2021
Revised Date: 28 April 2021
Available Online: 10 November 2021


摘要
摘要:慢太阳风的起源是一个困扰空间物理领域多年的问题，一些研究人员认为慢太阳风中阿尔芬度比较高的部分起源于小冕洞或者是冕洞的边界，不过另外一些研究者发现高阿尔芬度慢太阳风在成分上和低阿尔芬度的慢太阳风并无显著差别.最近的一项研究中发现的慢太阳风中的小冕洞风并没有特别高的阿尔芬度.我们利用一个简单的二维太阳风模型计算了阿尔芬波和小冕洞风的传播；计算结果显示，由于阿尔芬波的传播特性，从小冕洞出发的等离子体和阿尔芬波动在传播到1AU的过程中会发生分离，形成了低阿尔芬度的小冕洞风和高阿尔芬度的普通慢风.这个结果定性地解释了慢太阳风中观测到的小冕洞风和高阿尔芬度慢风的特性，也为解开慢太阳风的起源之谜提供了新的思路.
关键词: 太阳风/
小冕洞风/
阿尔芬波/
阿尔芬度

Abstract:The origin of the slow solar wind has been a puzzle in the field of space physics for many years. Some researchers suggest that Alfvénic slow winds originate from small coronal holes or at the boundary of coronal holes, although others have found that Alfvénic slow winds does not differ in compositions from the non-Alfvénic slow wind. A small coronal hole wind embedded in the slow solar wind is reported recently, but of lower Alfvénicity. We calculated the propagation of small coronal hole winds and Alfvén waves using a simple two-dimensional solar wind model; the results show that the Alfvén waves are separated from the co-originated plasma during the propagation, leading to small coronal hole winds with low Alfvénicity and ordinary slow winds with high Alfvénicity. This result qualitatively explains the properties of the small coronal hole winds and Alfvénic slow wind with normal slow wind properties. This study provides a new insight into the origin of the slow solar wind mystery.
Key words:Solar wind/
Small coronal hole wind/
Alfvén wave/
Alfvénicity



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