Electromagnetic Ion Beam Instability in the Solar Corona

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外文摘要：Remote-sensing measurements indicate that heavy ions in the corona undergo an anisotropic and mass-charge dependent energization.A popular explanation to this phenomenon is the damping of the Alfvén/ion cyclotron waves.In this paper,we propose that the ion beam instability can be an important source of the Alfvén/ion cyclotron waves,and we study the excitation of the ion beam instability in the corona at the heliocentric distance～3R⊙ and the corresponding energy transfer process therein based on plasma kinetic theory.The results indicate that the existence of the motionless heavy ions inhibits the ion beam instability.However,the anisotropic beams of heavy ions promote the excitation of the ion beam instability.Besides,the existence of α beams can provide a second energy source for exciting beam instability.However,when both the proton beam and the α beam reach the instability excitation threshold,the proton beam driven instability excites preferentially.Moreover,the excitation threshold of the Alfvén/ion cyclotron instability driven by ion beam is of the local Alfvén speed or even less in the corona.

外文关键词：

plasmasinstabilitieswavesSun:corona

作者：

Wen Liu、Jin-Song Zhao、De-Jin Wu、Huan-Yu Jia、Si-Ming Liu

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作者单位：

School of Mechanics and Aeronautics,Southwest Jiaotong University,Chengdu 610000,China

School of Physical Science and Technology,Southwest Jiaotong University,Chengdu 610000,China

Key Laboratory of Planetary Sciences,Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023,China

基金：

国家自然科学基金

项目编号：

12347166

出版年：

2024

DOI：

10.1088/1674-4527/ad1bd6

天文和天体物理学研究

中国科学院国家天文台

天文和天体物理学研究

CSTPCD

影响因子：0.406

ISSN：1674-4527

年,卷(期)：2024.24(2)

参考文献量53