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Compressible turbulence in Hall Magnetohydrodynamics by S. Servidio; V. Carbone; L. Primavera; P. Veltri; K. Stasiewicz is a Physics and Astronomy article available to read on EtoBox.

What is Compressible turbulence in Hall Magnetohydrodynamics about?

By direct numerical simulations we investigate the nonlinear dynamics of a compressible Hall Magnetohydrodynamic (MHD) plasma. At small scales, where the Hall effect dominates, we found an increase of the compressibility of the system and the breakdown of the strong link between velocity and magnetic fields, typical of usual MHD. Moreover, we find that small-scale fluctuations are characterized by an anti-correlation between density and magnetic field intensity. These features characterize the excitation of a quasi-perpendicular magnetosonic turbulence that can be interpreted as the small-scale signature of the break-down of the MHD nonlinear energy cascade due to Hall effect. Fluctuations with the same properties, based on measurements by Cluster spacecraft in space plasma turbulence during different magnetopause crossings, have been recently observed.

Who reads Compressible turbulence in Hall Magnetohydrodynamics?

Author

S. Servidio; V. Carbone; L. Primavera; P. Veltri; K. Stasiewicz

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0032-0633)

Published

2007

Language

EN

Field

Physics and Astronomy (Physical Sciences)