...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >The plasma structure of coronal hole solar wind: Origins and evolution
【24h】

The plasma structure of coronal hole solar wind: Origins and evolution

机译：日冕洞太阳风等离子体结构:起源和演化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Whereas slow solar wind is known to be highly structured, the fast (coronal hole origin) wind is usually considered to be homogeneous. Using measurements from Helios 1 + 2, ACE, Wind, and Ulysses, structure in the coronal hole origin solar wind is examined from 0.3AU to 2.3AU. Care is taken to collect and analyze intervals of "unperturbed coronal hole plasma." In these intervals, solar wind structure is seen in the proton number density, proton temperature, proton specific entropy,magnetic field strength, magnetic field to density ratio, electron heat flux, helium abundance, heavy-ion charge-state ratios, and Alfvenicity. Typical structure amplitudes are factors of 2, far from homogeneous. Variations are also seen in the solar wind radial velocity. Using estimates of the motion of the solar wind origin footpoint on the Sun for the various spacecraft, the satellite time series measurements are converted to distance along the photosphere. Typical variation scale lengths for the solar wind structure are several variations per supergranule. The structure amplitude and structure scale sizes do not evolve with distance fromthe Sun from 0.3 to 2.3AU. An argument is quantified that these variations are the scale expected for solar wind production in openmagnetic flux funnels in coronal holes. Additionally, a population of magnetic field foldings (switchbacks, reversals) in the coronal hole plasma is examined: this population evolves with distance from the Sun such that the magnetic field is mostly Parker spiral aligned at 0.3AU and becomes more misaligned with distance outward.
机译：而缓慢的太阳风著称结构化、快速(日冕洞的起源)通常被认为是均匀的。测量从Helios 1 + 2,王牌,风,和尤利西斯,日冕洞结构的起源太阳风是检查了从0.3到2.3(非盟盟。被收集和分析时间间隔“镇定日冕洞等离子体”。间隔,太阳风结构的质子质子数密度、温度、质子具体的熵,磁场强度,磁场密度比、电子热量通量,氦丰富,重离子电荷状态比率,Alfvenicity。振幅的因素2,远离同构的。太阳风径向速度。太阳风footpoint起源的运动太阳为各种航天器,卫星时间序列的测量转换为在光球层的距离。太阳风结构规模的长度每supergranule几个变化。结构振幅和结构规模大小没有进化距离从太阳从0.3到2.3天文单位。是太阳风的规模预期变化生产openmagnetic通量漏斗日冕洞。磁场的褶皱(盘山路,逆转)在日冕洞等离子体检查:这人口发展与太阳的距离这样的磁场主要是帕克螺旋0.3 au和变得更加一致与向外距离偏差。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号