The making of an Alfvénic fluctuation: The resolution of a second-order analysis

Details The making of an Alfvénic fluctuation: The resolution of a second-order analysis The making of an Alfvénic fluctuation: The resolution of a second-order analysis

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..382..331v&link_type=abstract

Proceedings of the eigth international solar wind conference: Solar wind eight. AIP Conference Proceedings, Volume 382, pp. 331

Physics

Solar Wind Plasma, Sources Of Solar Wind, Magnetohydrodynamic Waves, Magnetohydrodynamic And Fluid Equation

Scientific paper

We perform 112-D hybrid numerical simulations of initially linearly polarized and obliquely propagating Alfvén waves. These simulations can outline the actual role of ion kinetics. We find that moderate (δB/B<~0.5) amplitude wave trains in warm ion plasmas have a tendency to evolve to a B-constant state with arc polarization and are well described by a weakly nonlinear treatment. However, the generated magnetosonic fast modes are only weakly damped for small plasma β(<~0.5). As a result, B does not asymptote to a constant over many wave train periods. These results can be used to explain the formation of arc polarized Alfvénic fluctuations in the solar wind.

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