Search Publications
Solar wind Cluster observations: Turbulent spectrum and role of Hall effect
Alexandrova, O.; Carbone, V.; Veltri, P. +1 more
Turbulent spectrum of magnetic fluctuations in the solar wind nearly follows Kolmogorov's law ∼f 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, …
Cluster observations of Pc 1 2 waves and associated ion distributions during the October and November 2003 magnetic storms
Glassmeier, K. -H.; Rème, H.; Keiling, A. +7 more
Unusual wave activity in the Pc 1-2 frequency band (0.1-5 Hz) was observed by the Cluster spacecraft in association with the two large geomagnetic storms of late 2003. During the onset of the Hallowe'en storm on October 29, 2003, intense broadband activity between ∼0.1 and 0.6 Hz appeared at all 4 spacecraft on both sides of the magnetic equator a…
Compressible turbulence in Hall Magnetohydrodynamics
Carbone, V.; Veltri, P.; Stasiewicz, K. +2 more
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…
Statistics of low-frequency variations in solar wind, foreshock and magnetosheath: INTERBALL-1 and CLUSTER data
Du, J.; Shevyrev, N. N.; Zastenker, G. N.
The properties of small-scale ion flux and magnetic field fluctuations in the regions of undisturbed solar wind, foreshock and magnetosheath have been investigated. The systematic measurements of these parameters with very high time resolution, which were obtained onboard INTERBALL-1 spacecraft during 1996 2000, make it possible to examine their v…
Mode identification of terrestrial ULF waves observed by Cluster: A case study
Nilsson, H.; Walker, S. N.; Dunlop, M. +4 more
Using multipoint measurements from the Cluster mission wave identification techniques are applied to observations of ULF waves made in the terrestrial foreshock with the aim of identifying the modes and properties of the waves taking into account the effects of a high beta plasma. The wave properties in the spacecraft and plasma rest frames are ex…
Statistical properties of small-amplitude Langmuir waves in the Earth's electron foreshock
Soucek, J.; Décréau, P.; Krasnoselskikh, V. V. +2 more
We present the results of a statistical study of Langmuir waves observed by the Cluster spacecraft in the Earth's electron foreshock. To classify the probability density distributions of the logarithms of the wave energies, a Pearson technique is used. We show that experimental distributions can be better approximated, in a statistical sense, by B…
Low-frequency waves upstream and downstream of the terrestrial bow shock
Narita, Yasuhito
This is a Ph.D. thesis abstract.