SHINE Postdoc: Signatures of Heliospheric Topology

SHINE博士后：日光层拓扑的特征

• 批准号: 0327739
• 负责人: Nancy Crooker
• 金额: --
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-01 至 2005-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0327739&HistoricalAwards=false
• 关键词: SHINE; Postdoc; Signatures; Heliospheric; Topology

This study will focus on the physical phenomena that give rise to a signature in the population of solar wind electrons commonly referred to as a "heat flux dropout" (HFD). Understanding what causes HFDs is important because the degree to which magnetic field lines are disconnected from the sun is a diagnostic tool capable of distinguishing between competing models of how the sun's magnetic field reverses over the course of the 22-year solar cycle. A program of data analysis and theory will be performed. A survey of HFD data from the Wind spacecraft will provide a base for statistical studies of HFD frequency and morphology in the context of solar wind structures. A complementary collaborative theoretical study will address the question of whether pitch-angle isotropy in the HFDs is attributable to instabilities sensitive to the plasma beta, independent of variations in the total flux.

这项研究将重点关注的物理现象，引起的签名，在人口的太阳风电子通常被称为“热通量下降”（HFD）。了解导致HFD的原因很重要，因为磁场线与太阳断开的程度是一种诊断工具，能够区分太阳磁场在22年太阳周期中如何逆转的竞争模型。将进行数据分析和理论的程序。调查的HFD数据从风航天器将提供一个基础的统计研究HFD频率和形态的背景下，太阳风结构。一个互补的合作理论研究将解决的问题，是否俯仰角各向同性的HFD是由于不稳定性敏感的等离子体β，独立的总通量的变化。