Artículos de revistas
Interplay between Alfvén and magnetosonic waves in compressible magnetohydrodynamics turbulence
Andrés, Nahuel; Clark Di Leoni, Patricio; Mininni, Pablo Daniel; Dmitruk, Pablo Ariel; Sahraoui, F.; et al.; Interplay between Alfvén and magnetosonic waves in compressible magnetohydrodynamics turbulence; American Institute of Physics; Physics Of Plasmas; 24; 10; 10-2017; 1-9
Clark Di Leoni, Patricio
Mininni, Pablo Daniel
Dmitruk, Pablo Ariel
Matthaeus, W. H.
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.