arXiv Open Access 2022

On the Existence of Fast Modes in Compressible Magnetohydrodynamic Turbulence

Zhaoming Gan Hui Li Xiangrong Fu Senbei Du

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Abstrak

We study the existence and property of Fast magnetosonic modes in 3D compressible MHD turbulence by carrying out a number of simulations with compressible and incompressible driving conditions. We use two approaches to determine the presence of Fast modes: mode decomposition based on spatial variations only and spatio-temporal 4D-FFT analysis of all fluctuations. The latter method enables us to quantify fluctuations that satisfy the dispersion relation of Fast modes with finite frequency. Overall, we find that the fraction of Fast modes identified via spatio-temporal 4D FFT approach in total fluctuation power is either tiny with nearly incompressible driving or ~2% with highly compressible driving. We discuss the implications of our results for understanding the compressible fluctuations in space and astrophysics plasmas.

Topik & Kata Kunci

physics.space-ph astro-ph.SR physics.flu-dyn physics.plasm-ph

Penulis (4)

Zhaoming Gan

Hui Li

Xiangrong Fu

Senbei Du

Format Sitasi

APA MLA BibTeX

Gan, Z., Li, H., Fu, X., Du, S. (2022). On the Existence of Fast Modes in Compressible Magnetohydrodynamic Turbulence. https://arxiv.org/abs/2201.07965

Akses Cepat

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Informasi Jurnal

Tahun Terbit: 2022
Bahasa: en
Sumber Database: arXiv
Akses: Open Access ✓