Physics – Plasma Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh51d1720g&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SH51D-1720
Physics
Plasma Physics
[7800] Space Plasma Physics, [7839] Space Plasma Physics / Nonlinear Phenomena, [7867] Space Plasma Physics / Wave/Particle Interactions, [7868] Space Plasma Physics / Wave/Wave Interactions
Scientific paper
Large-amplitude and spatially localized Langmuir waves are frequently observed in the solar wind, usually destabilized by energetic electron beams. Recent modeling using the high-frequency component of the Zakharov equations with terms describing the beam and a prescribed inhomogeneous density background, as in the solar wind plasma, are in good agreement with in-situ observations by the TDS instrument on board the STEREO spacecrafts (Zaslavsky, 2010). However this model does not describe self-consistently the dynamics of the low-frequency plasma density fluctuations. We present a model where the plasma density fluctuations are included using the full Zakharov's equations. Simulations of beam-driven Langmuir waves are compared, where the low-frequency dynamics are self-consistently evolved. These results are further discussed with recent in-situ wave measurements done by STEREO.
Guio Pactrick
Zaslavsky Alexander
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