Interplay between Alfvén and magnetosonic waves in compressible magnetohydrodynamics turbulence
Using spatio-temporal spectra, we show direct evidence of excitation of magnetosonic and Alfvén waves in three-dimensional compressible magnetohydrodynamic turbulence at small Mach numbers. For the plasma pressure dominated regime, or the high β regime (with β the ratio between fluid and magnetic pr...
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2017
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1070664X_v24_n10_p_Andres http://hdl.handle.net/20.500.12110/paper_1070664X_v24_n10_p_Andres |
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paper:paper_1070664X_v24_n10_p_Andres2023-06-08T16:04:41Z Interplay between Alfvén and magnetosonic waves in compressible magnetohydrodynamics turbulence Energy transfer Incompressible flow Magnetic fields Magnetism Magnetohydrodynamics Turbulence Guide magnetic field Magnetic field fluctuations Magnetic pressure Magnetohydrodynamic turbulence Magnetohydrodynamics turbulences Magnetosonic mode Magnetosonic waves Plasma pressures Magnetoplasma Using spatio-temporal spectra, we show direct evidence of excitation of magnetosonic and Alfvén waves in three-dimensional compressible magnetohydrodynamic turbulence at small Mach numbers. For the plasma pressure dominated regime, or the high β regime (with β the ratio between fluid and magnetic pressure), and for the magnetic pressure dominated regime, or the low β regime, we study magnetic field fluctuations parallel and perpendicular to a guide magnetic field B0. In the low β case, we find excitation of compressible and incompressible fluctuations, with a transfer of energy towards Alfvénic modes and to a lesser extent towards magnetosonic modes. In particular, we find signatures of the presence of fast magnetosonic waves in a scenario compatible with that of weak turbulence. In the high β case, fast and slow magnetosonic waves are present, with no clear trace of Alfvén waves, and a significant part of the energy is carried by two-dimensional turbulent eddies. © 2017 Author(s). 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1070664X_v24_n10_p_Andres http://hdl.handle.net/20.500.12110/paper_1070664X_v24_n10_p_Andres |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Energy transfer Incompressible flow Magnetic fields Magnetism Magnetohydrodynamics Turbulence Guide magnetic field Magnetic field fluctuations Magnetic pressure Magnetohydrodynamic turbulence Magnetohydrodynamics turbulences Magnetosonic mode Magnetosonic waves Plasma pressures Magnetoplasma |
| spellingShingle |
Energy transfer Incompressible flow Magnetic fields Magnetism Magnetohydrodynamics Turbulence Guide magnetic field Magnetic field fluctuations Magnetic pressure Magnetohydrodynamic turbulence Magnetohydrodynamics turbulences Magnetosonic mode Magnetosonic waves Plasma pressures Magnetoplasma Interplay between Alfvén and magnetosonic waves in compressible magnetohydrodynamics turbulence |
| topic_facet |
Energy transfer Incompressible flow Magnetic fields Magnetism Magnetohydrodynamics Turbulence Guide magnetic field Magnetic field fluctuations Magnetic pressure Magnetohydrodynamic turbulence Magnetohydrodynamics turbulences Magnetosonic mode Magnetosonic waves Plasma pressures Magnetoplasma |
| description |
Using spatio-temporal spectra, we show direct evidence of excitation of magnetosonic and Alfvén waves in three-dimensional compressible magnetohydrodynamic turbulence at small Mach numbers. For the plasma pressure dominated regime, or the high β regime (with β the ratio between fluid and magnetic pressure), and for the magnetic pressure dominated regime, or the low β regime, we study magnetic field fluctuations parallel and perpendicular to a guide magnetic field B0. In the low β case, we find excitation of compressible and incompressible fluctuations, with a transfer of energy towards Alfvénic modes and to a lesser extent towards magnetosonic modes. In particular, we find signatures of the presence of fast magnetosonic waves in a scenario compatible with that of weak turbulence. In the high β case, fast and slow magnetosonic waves are present, with no clear trace of Alfvén waves, and a significant part of the energy is carried by two-dimensional turbulent eddies. © 2017 Author(s). |
| title |
Interplay between Alfvén and magnetosonic waves in compressible magnetohydrodynamics turbulence |
| title_short |
Interplay between Alfvén and magnetosonic waves in compressible magnetohydrodynamics turbulence |
| title_full |
Interplay between Alfvén and magnetosonic waves in compressible magnetohydrodynamics turbulence |
| title_fullStr |
Interplay between Alfvén and magnetosonic waves in compressible magnetohydrodynamics turbulence |
| title_full_unstemmed |
Interplay between Alfvén and magnetosonic waves in compressible magnetohydrodynamics turbulence |
| title_sort |
interplay between alfvén and magnetosonic waves in compressible magnetohydrodynamics turbulence |
| publishDate |
2017 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1070664X_v24_n10_p_Andres http://hdl.handle.net/20.500.12110/paper_1070664X_v24_n10_p_Andres |
| _version_ |
1768544238268579840 |