Computer Science – Numerical Analysis
Scientific paper
Nov 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...234..348s&link_type=abstract
Astrophysical Journal, Part 1, vol. 234, Nov. 15, 1979, p. 348-362. Navy-supported research.
Computer Science
Numerical Analysis
35
Magnetohydrodynamic Stability, Solar Physics, Type 3 Bursts, Coupling Coefficients, Density Distribution, Electron Flux Density, Electron Oscillations, Energy Dissipation, Interplanetary Medium, Ion Density (Concentration), Nonlinearity, Numerical Analysis, Wave Interaction
Scientific paper
A theory of the excitation of solar type III bursts is presented. Electrons initially unstable to the linear bump-in-tail instability are shown to rapidly amplify Langmuir waves to energy densities characteristic of strong turbulence. The three-dimensional equations which describe the strong coupling (wave-wave) interactions are derived. For parameters characteristic of the interplanetary medium the equations reduce to one-dimension. In that case the oscillating two-stream instability (OTSI) is the dominant nonlinear instability. OTSI is stabilized through the production of nonlinear ion density fluctuations that efficiently scatter Langmuir waves out of resonance with the electron beam. An analytical model of the electron distribution function is also developed which is used to estimate the total energy losses suffered by the electron beam as it propagates from the solar corona to 1 AU and beyond.
Goldstein Michel L.
Papadopoulos Konstantinos
Smith Robert A.
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