Physics – Plasma Physics
Scientific paper
Oct 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jgra..11110101m&link_type=abstract
Journal of Geophysical Research, Volume 111, Issue A10, CiteID A10101
Physics
Plasma Physics
14
Space Plasma Physics: Kinetic Waves And Instabilities, Interplanetary Physics: Solar Wind Plasma, Space Plasma Physics: Wave/Particle Interactions (2483, 6984), Interplanetary Physics: Interplanetary Magnetic Fields
Scientific paper
We report a study of the properties of the parallel proton fire hose instability comparing the results obtained by the linear analysis, from one-dimensional (1-D) standard hybrid simulations and 1-D hybrid expanding box simulations. The three different approaches converge toward the same instability threshold condition which is in good agreement with in situ observations, suggesting that such instability is relevant in the solar wind context. We investigate also the effect of the wave-particle interactions on shaping the proton distribution function and on the evolution of the spectrum of the magnetic fluctuations during the expansion. We find that the resonant interaction can provide the proton distribution function to depart from the bi-Maxwellian form.
Hellinger Petr
Landi Simone
Matteini Lorenzo
Velli M. M.
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