Direct evidence for the presence of an inertial energy cascade, the most characteristic signature of hydromagnetic turbulence (MHD), is observed in the solar wind by the Ulysses spacecraft. A linear relation is indeed observed for the scaling of mixed ̈ third order structure functions involving Elsasser variables. This experimental result, confirming the prescription stemming from a theorem for MHD turbulence, firmly estab- lishes the turbulent character of low-frequency velocity and magnetic field fluctuations in the solar wind plasma.

The Energy Cascade in Solar Wind MHD Turbulence

CARBONE, Vincenzo;
2009-01-01

Abstract

Direct evidence for the presence of an inertial energy cascade, the most characteristic signature of hydromagnetic turbulence (MHD), is observed in the solar wind by the Ulysses spacecraft. A linear relation is indeed observed for the scaling of mixed ̈ third order structure functions involving Elsasser variables. This experimental result, confirming the prescription stemming from a theorem for MHD turbulence, firmly estab- lishes the turbulent character of low-frequency velocity and magnetic field fluctuations in the solar wind plasma.
Solar wind ; Magnetohydrodynamics ; turbulence
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/144784
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