Jets with Kelvin-Helmholtz waves at the Earth’s magnetopause under pure southward IMF conditions

The Kelvin-Helmholtz (KH) waves have been frequently observed during the northward interplanetary magnetic field (IMF) but have been much less frequently observed during the southward IMF. Here, we performed a 3D MHD simulation of a KH wave to investigate the evolution of KH instability under the pu...

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Bibliographic Details
Published in:Astrophysics and space science 2023-03, Vol.368 (3), p.12, Article 12
Main Authors: Wang, Jia-Qi, Yang, Yang, Khan, Saleem, Wang, Xiang-Li, Yuan, Hua-Xuan-Yu, Duan, Wen-shan
Format: Article
Language:English
Subjects:
Astrobiology
Astronomy
Astrophysics
Astrophysics and Astroparticles
Cosmology
Interplanetary magnetic field
Jet flow
Kelvin-Helmholtz waves
Linear phase
Magnetic fields
Magnetopause
Observations and Techniques
Physics
Physics and Astronomy
Plasma
Simulation
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
Spine
Velocity
Vortices
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Summary:The Kelvin-Helmholtz (KH) waves have been frequently observed during the northward interplanetary magnetic field (IMF) but have been much less frequently observed during the southward IMF. Here, we performed a 3D MHD simulation of a KH wave to investigate the evolution of KH instability under the pure southward IMF condition. In the linear phase of KH instability, there are almost no jet flows along northward and southward. In the nonlinear growth phase, the width of the KH vortex is about ∼ 12 λ , and the duration time of the KH vortex is about ∼ 20 t A . Moreover, the obvious jet flows whose peak V z value is about ∼ 0.5 V A are distributed in both the spine region and the edge of the KH vortex.
ISSN:0004-640X
1572-946X
DOI:10.1007/s10509-023-04168-4