Ion Heating in Coronal Holes and the Fast Solar Wind: A Theoretical Model Based on Plasma Microinstabilities

冕洞中的离子加热和快速太阳风：基于等离子体微观不稳定性的理论模型

• 批准号: 0211402
• 负责人: Joseph Hollweg
• 金额: $ 30.03万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-15 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0211402&HistoricalAwards=false
• 关键词: Ion; Heating; Coronal; Holes; Fast

A kinetic theory of the electron heat flux instability in low-beta solar coronal holes will be developed and its role in the heating and acceleration of the fast solar wind will be investigated. A new paradigm is advanced, wherein the electron heat flux coming from the sun is produced by nanoflares and then generates ion cyclotron waves, which subsequently heat the overlying corona. Thus the solar wind driven by ion cyclotron waves is directly coupled to the nanoflare activity. A new wave damping mechanism, involving the parametric resonance of particles with a pump wave which drives a cross-field current instability, and the waves generated by the instability, will be modeled analytically and numerically. Finally, a kinetic theory of ion heating in the fast solar wind as a result of this cross-field current instability will be investigated.

本文将建立低β日冕空穴中电子热流不稳定性的动力学理论，并研究其在快速太阳风加热和加速中的作用。提出了一种新的模式，其中来自太阳的电子热流由纳米耀斑产生，然后产生离子回旋波，随后加热上覆的日冕。因此，由离子回旋波驱动的太阳风与纳米耀斑活动直接相关。一种新的波阻尼机制，涉及粒子与驱动跨场电流不稳定性的泵浦波的参数共振，以及由不稳定性产生的波，将被解析和数值模拟。最后，我们将研究快速太阳风中离子加热的动力学理论。