Yang Yang, HuaXuanYu Yuan, JiaQi Wang, Saleem Khan
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Alfvén resonance on Kelvin-Helmholtz vortices at the Earth’s magnetopause
The Alfvén resonance is an extensively observed phenomenon in astrophysics, playing a crucial role in understanding energy transfer, macroscopic structure, and evolutionary processes within celestial environments such as the magnetospheres of stars, planets, and other astrophysical objects. In this work, we investigate the spatial and temporal distribution of the Alfvén resonance points during the evolution of Kelvin-Helmholtz instability (KHI) at Earth’s dusk-flank magnetopause in numerical MHD simulation. The results show that, there is no appearance of the Alfvén resonance points \(P_{AR}\) during the linear phase. In the early nonlinear phase, the Alfvén resonance points \(P_{AR}\), whose duration time is approximately \(\Delta {t_{1}} \sim 3{t_{A}}\), looks like the “eyelid” of the KH vortex. During the nonlinear growth phase, the Alfvén resonance points \(P_{AR}\), whose duration time is about \(\Delta {t_{2}} \sim 6{t_{A}}\), appear at both the “eyelid” and the outer “corner” of the KH vortex. The Alfvén resonance phenomenon disappears with the decay of KH vortex.
期刊介绍:
Astrophysics and Space Science publishes original contributions and invited reviews covering the entire range of astronomy, astrophysics, astrophysical cosmology, planetary and space science and the astrophysical aspects of astrobiology. This includes both observational and theoretical research, the techniques of astronomical instrumentation and data analysis and astronomical space instrumentation. We particularly welcome papers in the general fields of high-energy astrophysics, astrophysical and astrochemical studies of the interstellar medium including star formation, planetary astrophysics, the formation and evolution of galaxies and the evolution of large scale structure in the Universe. Papers in mathematical physics or in general relativity which do not establish clear astrophysical applications will no longer be considered.
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