Solar wind turbulent spectra and role of hall effect: A case study

Abstract:

Turbulent fluctuations within solar wind spectrum follows nearly Kolmogorov's power law spectrum f-5/3 below the ion cyclotron frequency fci. Above this frequency, the observed steeper power law is believed to be a 'dissipative range' of the solar wind turbulence. In this paper we analyze magnetic field fluctuations measured onboard CLUSTER, lasting two decades above fci. Well defined power law and a strong increase of intermittency with frequency in this range indicates that turbulence cannot be characterized by a 'dissipative range'. Rather we conjecture that above fci the turbulence is generated by a different nonlinear cascade where, using Hall MHD formulation in the incompressible limit, magnetic power follows f-7/3-law.

Año de publicación:

2006

Keywords:

• ESA
• LaTeX
• Macros

Fuente:

scopus