Physics – Plasma Physics
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jgra..10905103v&link_type=abstract
Journal of Geophysical Research, Volume 109, Issue A5, CiteID A05103
Physics
Plasma Physics
2
Interplanetary Physics: Mhd Waves And Turbulence, Space Plasma Physics: Kinetic And Mhd Theory, Space Plasma Physics: Numerical Simulation Studies, Space Plasma Physics: Turbulence, Space Plasma Physics: Wave/Particle Interactions
Scientific paper
We expand the compressible magnetohydrodynamic (MHD) equations in terms of the amplitude of first-order Alfvén waves. Incompressible MHD equations are treated as a special case. We examine the evolution of mildly oblique Alfvén waves consisting of forward and backward propagating waves so that these would correspond to the interactions of outgoing and ingoing Alfvén waves in the solar wind. We obtain the solutions of these equations through second order. We find and distinguish three types of second-order modes which have zero frequency and are generated in association with nonsecular interactions of mildly oblique first-order Alfvén waves. Two of these modes have wave vectors which are perpendicular to the background magnetic field. Both are associated with magnetic energy but they do not have kinetic energy.
Hollweg Joseph V.
Vasquez Bernard J.
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