Mathematics – Probability
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsh12a0411z&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #SH12A-0411
Mathematics
Probability
2118 Energetic Particles, Solar, 2134 Interplanetary Magnetic Fields, 2159 Plasma Waves And Turbulence, 2164 Solar Wind Plasma
Scientific paper
Type III solar radio bursts, which are characterized by a rapid frequency drift rate, are generated by interactions between electron beam-driven Langmuir waves and the solar wind. Wave-wave theories of plasma radio emission require the presence of both Langmuir waves around f_pe and ion acoustic waves below 10khz in the source region of the radio burst. We use data from the Wind WAVES and 3DP instruments to study the statistics and properties of these waves in 10 in situ type III bursts observed between 1995 and 2002. We show the probability distributions of wave amplitude and dimensionless energy W = epsilon0*E2 / n*kb*T_e. W is generally too small for strong turbulence to be important. We also show that the observed bandwidth of Langmuir waves suggests a small role for nonlinear wave-wave processes. The occurrence of ion acoustic waves in type III sources is not statistically significant nor dependant on solar wind ion/electron temperature ratios.
Bale Stuart
Salem C.
Zuev Yuri
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