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| Titel |
Kinetic Simulations of Solar Type II Radio Burst Emission |
| VerfasserIn |
U. Ganse, P. Kilian, F. Spanier, R. Vainio |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250060095
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| Zusammenfassung |
| Propagation of coronal mass ejection (CME) shock fronts in the heliosphere is often
accompanied by the emission of so-called type II radio bursts, which are multi banded
emission features.
Their complex emission spectra indicate that interaction processes of multiple plasma
waves are responsible for their creation, but the requirement for kinetic treatmet of the
problem, together with the large separation of involved lengthscales have made simulations of
this phenomenon challenging.
Using the ACRONYM particle-in-cell code, we have investigated the plasma
microphysics in the CME foreshock region. We were able to consistently reproduce the
electron beam-driven excitation of electrostatic waves and their subsequent nonlinear
coupling to form fundamental and harmonic radio emissions. |
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