Temporal Properties of Compressible Magnetohydrodynamic Turbulence
Describing the temporal properties of compressible magnetohydrodynamic (MHD) turbulence is a fundamental problem that has important implications for particle acceleration and transport in astrophysical plasmas. Here, by carefully analyzing the spatial and temporal properties of compressible MHD turb...
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/add3ee |
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| author | Ka Ho Yuen Hui Li Huirong Yan |
| author_facet | Ka Ho Yuen Hui Li Huirong Yan |
| author_sort | Ka Ho Yuen |
| collection | DOAJ |
| description | Describing the temporal properties of compressible magnetohydrodynamic (MHD) turbulence is a fundamental problem that has important implications for particle acceleration and transport in astrophysical plasmas. Here, by carefully analyzing the spatial and temporal properties of compressible MHD turbulence, we derive a new spectral power density function that is supported by simulations. This new function reveals that the low-frequency fluctuations are dominated by modes with small parallel wavenumbers with respect to the mean background magnetic field. Furthermore, for fluctuations with dynamically significant parallel wavenumbers, broadening around their eigenfrequencies is described by this function, which is in close agreement with simulations. We use this formalism to present the scaling properties of individual MHD modes. Such broadening is a direct consequence of nonlinear processes and is different for the three fundamental MHD modes. Our results provide a new window to investigate the temporal properties of turbulence and will enable further studies on the interaction between compressible MHD turbulence and energetic plasmas. |
| format | Article |
| id | doaj-art-a38246ef60054d4a8bd8fc766a506845 |
| institution | OA Journals |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj-art-a38246ef60054d4a8bd8fc766a5068452025-08-20T02:37:10ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01986222110.3847/1538-4357/add3eeTemporal Properties of Compressible Magnetohydrodynamic TurbulenceKa Ho Yuen0https://orcid.org/0000-0003-1683-9153Hui Li1https://orcid.org/0000-0003-3556-6568Huirong Yan2https://orcid.org/0000-0003-2560-8066Theoretical Division, Los Alamos National Laboratory , Los Alamos, NM, USA ; kyuen@lanl.gov, kyuen2.astro@gmail.comTheoretical Division, Los Alamos National Laboratory , Los Alamos, NM, USA ; kyuen@lanl.gov, kyuen2.astro@gmail.comDeutsches Elektronen-Synchrotron DESY , Zeuthen, Germany; Institut für Physik & Astronomie, Universität Potsdam , Potsdam, GermanyDescribing the temporal properties of compressible magnetohydrodynamic (MHD) turbulence is a fundamental problem that has important implications for particle acceleration and transport in astrophysical plasmas. Here, by carefully analyzing the spatial and temporal properties of compressible MHD turbulence, we derive a new spectral power density function that is supported by simulations. This new function reveals that the low-frequency fluctuations are dominated by modes with small parallel wavenumbers with respect to the mean background magnetic field. Furthermore, for fluctuations with dynamically significant parallel wavenumbers, broadening around their eigenfrequencies is described by this function, which is in close agreement with simulations. We use this formalism to present the scaling properties of individual MHD modes. Such broadening is a direct consequence of nonlinear processes and is different for the three fundamental MHD modes. Our results provide a new window to investigate the temporal properties of turbulence and will enable further studies on the interaction between compressible MHD turbulence and energetic plasmas.https://doi.org/10.3847/1538-4357/add3eeAstrophysical fluid dynamicsPlasma astrophysicsMagnetohydrodynamical simulations |
| spellingShingle | Ka Ho Yuen Hui Li Huirong Yan Temporal Properties of Compressible Magnetohydrodynamic Turbulence The Astrophysical Journal Astrophysical fluid dynamics Plasma astrophysics Magnetohydrodynamical simulations |
| title | Temporal Properties of Compressible Magnetohydrodynamic Turbulence |
| title_full | Temporal Properties of Compressible Magnetohydrodynamic Turbulence |
| title_fullStr | Temporal Properties of Compressible Magnetohydrodynamic Turbulence |
| title_full_unstemmed | Temporal Properties of Compressible Magnetohydrodynamic Turbulence |
| title_short | Temporal Properties of Compressible Magnetohydrodynamic Turbulence |
| title_sort | temporal properties of compressible magnetohydrodynamic turbulence |
| topic | Astrophysical fluid dynamics Plasma astrophysics Magnetohydrodynamical simulations |
| url | https://doi.org/10.3847/1538-4357/add3ee |
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