...
  • 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 >Evidence of m = 1 density mode (plasma cam) in Saturn’s rotating magnetosphere
【24h】

Evidence of m = 1 density mode (plasma cam) in Saturn’s rotating magnetosphere

机译：m = 1的证据密度模式(等离子凸轮)土星的旋转磁场

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

Cassini field and plasma data measured in the rotating Saturn Longitude System 3 (SLS3) coordinate system show positive evidence of structure whose dominant azimuthal wave number is m = 1: a long-lived, nonaxisymmetric, cam-shaped, global plasma distribution in Saturn’s magnetosphere. Previous studies have identified evidence of this plasma cam in wave-derived electron density data and in Cassini Plasma Spectrometer (CAPS) W~+ ion counts data. In this paper we report the first comprehensive analysis of CAPS ion moments data to identify the m = 1 density cam. We employ a multiyear, multispecies database of 685,678 CAPS density values, binned into a 1 R_S by 4.8° discretized grid, spanning 4–19 R_S. Fourier(harmonic) analysis shows that at most radial distances the dominant azimuthal mode is m= 1, for both W~+ and H~+ ion distributions. The majority (63%) of m = 1 ion peaks are clustered in an SLS3 quadrant centered at 330°. The plasma cam’s existence has important implications for the global interchange-driven convection cycle and is a clue to solving the mystery of the rotational periodicities in Saturn’s magnetosphere.
机译：卡西尼号场和等离子体数据的测量旋转土星经度系统3 (SLS3)坐标系统显示积极的证据结构的优势方位波数m = 1:长寿、nonaxisymmetric cam-shaped,全球等离子体在土星的分布磁气圈。这方面的证据在wave-derived等离子凸轮在卡西尼号等离子体电子密度数据谱仪(帽)W ~ +离子计数数据。我们报告的第一个全面的分析帽离子的时刻数据识别m = 1密度凸轮。数据库的685678上限密度值,扔进垃圾箱成1 R_S 4.8°离散网格,生成4-19 R_S。最多径向距离优势方位模式是m = 1,对W ~ +和H ~ +离子分布。山峰都聚集在一个SLS3象限为中心在330°。影响全球interchange-driven解决对流循环,是一个线索神秘的旋转周期的研究土星的磁场。

著录项

相似文献

  • 外文文献
  • 中文文献
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