Solar wind cluster observations: Turbulent spectrum and role of Hall effect (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Solar wind cluster observations: Turbulent spectrum and role of Hall effect (Articolo in rivista) (literal)

Anno

• 2007-01-01T00:00:00+01:00 (literal)

Alternative label

• Alexandrova, O; Carbone, V; Veltri, P; Sorriso-Valvo, L (2007)
  Solar wind cluster observations: Turbulent spectrum and role of Hall effect
  in Planetary and space science
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Alexandrova, O; Carbone, V; Veltri, P; Sorriso-Valvo, L (literal)

Pagina inizio

• 2224 (literal)

Pagina fine

• 2227 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 55 (literal)

Rivista

• Planetary and space science (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Observ Paris, CNRS, LESIA, F-92195 Meudon, France; CNISM, Dip Fis, I-87036 Arcavacata Di Rende, Italy; CNR, LICRYL, I-87036 Arcavacata Di Rende, Italy (literal)

Titolo

• Solar wind cluster observations: Turbulent spectrum and role of Hall effect (literal)

Abstract

• Turbulent spectrum of magnetic fluctuations in the solar wind nearly follows Kolmogorov's law similar to f(-5/3) below the ion cyclotron frequency f(ci). 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 f(ci). 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 f(ci) the turbulence is generated by a different nonlinear cascade. We suggest that the presence of dispersive effects is responsible for a steepening of the spectral energy density, simply because a cascade can be realized in a time that is shorter than the usual eddy-turnover time. In the Hall MHD formulation, the magnetic power follows a law similar to f(-1/3+2x),, which depends on the degree of plasma compressibility alpha. (c) 2007 Elsevier Ltd. All rights reserved. (literal)

Prodotto di

• Soft Matter e nanotecnologie per elettro-ottica e di interesse biomedico e applicazioni tecnologiche correlate (MD.P01.015.009) (Modulo)
• Istituto per i processi chimico-fisici (IPCF) (Istituto)
• Soft Matter e nanotecnologie per elettro-ottica e di interesse biomedico e applicazioni tecnologiche correlate (MD.P01.016.001) (Modulo)

Autore CNR

• LUCA SORRISO VALVO (Unità di personale interno)

Insieme di parole chiave

• Keywords of "Solar wind cluster observations: Turbulent spectrum and role of Hall effect" (Insieme di parole chiave)

Incoming links:

Prodotto

• Istituto per i processi chimico-fisici (IPCF) (Istituto)
• Soft Matter e nanotecnologie per elettro-ottica e di interesse biomedico e applicazioni tecnologiche correlate (MD.P01.015.009) (Modulo)
• Soft Matter e nanotecnologie per elettro-ottica e di interesse biomedico e applicazioni tecnologiche correlate (MD.P01.016.001) (Modulo)

Autore CNR di

• LUCA SORRISO VALVO (Unità di personale interno)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Planetary and space science (Rivista)

Insieme di parole chiave di

• Keywords of "Solar wind cluster observations: Turbulent spectrum and role of Hall effect" (Insieme di parole chiave)