Simulations of coronal type III solar radio bursts: 1. Simulation model

Details Simulations of coronal type III solar radio bursts: 1. Simulation model Simulations of coronal type III solar radio bursts: 1. Simulation model

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jgra..11306104l&link_type=abstract

Journal of Geophysical Research, Volume 113, Issue A6, CiteID A06104

Physics

Plasma Physics

15

Solar Physics, Astrophysics, And Astronomy: Radio Emissions, Space Plasma Physics: Mathematical And Numerical Techniques (0500, 3200), Radio Science: Radio Wave Propagation, Solar Physics, Astrophysics, And Astronomy: Corona

Scientific paper

A simulation model is developed for type III bursts that originate in the solar corona and are observed at Earth. The model incorporates the three-dimensional structure of the source region, dynamics in the source of electron beam, Langmuir waves, ion-sound waves, electromagnetic emissions at the fundamental (f p ) and second harmonic (2f p ) of the plasma frequency, and propagation of electromagnetic radiation from the corona to interplanetary space, and it predicts the radiation dynamic spectrum measured by a remote observer. During the propagation of the radiation, the effects of refraction and reflection on large-scale density variations, scattering off small-scale density fluctuations, and free-free absorption are taken into account. The scattering of f p emission is modeled numerically on the basis of an analytic approach developed previously. The numerical results confirm approximations made in the approach and generalize it to more realistic solar plasma conditions.

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