当前位置：
X-MOL 学术
›
Res. Astron. Astrophys.
›
论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Electromagnetic Ion Beam Instability in the Solar Corona
Research in Astronomy and Astrophysics ( IF 1.8 ) Pub Date : 2024-01-31 , DOI: 10.1088/1674-4527/ad1bd6 Wen Liu , Jin-Song Zhao , De-Jin Wu , Huan-Yu Jia , Si-Ming Liu
Research in Astronomy and Astrophysics ( IF 1.8 ) Pub Date : 2024-01-31 , DOI: 10.1088/1674-4527/ad1bd6 Wen Liu , Jin-Song Zhao , De-Jin Wu , Huan-Yu Jia , Si-Ming Liu
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.
更新日期：2024-01-31
京公网安备 11010802027423号