HR: 1330h
AN: SH42C-0554    [PDF]
TI: A Quantitative Model for Terrestrial Foreshock Langmuir Waves and Radio Emission
AU: Kuncic, Z
EM: z.kuncic@physics.usyd.edu.au
AF: University of Sydney, School of Physics, Sydney, NSW 2006 Australia
AU: * Cairns, I H
EM: i.cairns@physics.usyd.edu.au
AF: University of Sydney, School of Physics, Sydney, NSW 2006 Australia
AU: Knock, S A
EM: s.knock@physics.usyd.edu.au
AF: University of Sydney, School of Physics, Sydney, NSW 2006 Australia
AB: Radio emissions near the first and second harmonics of the electron plasma frequency, as well as the Langmuir waves that produce them, are well known phenomena upstream from Earth's bow shock. Here, we present theoretical predictions for the spatial distribution and flux levels of the foreshock radio emissions generated in Earth's foreshock. The theoretical model combines electron reflection and acceleration at Earth's bow shock with stochastic growth theory for the steady-state production of Langmuir waves and nonlinear wave processes for the emission of electromagnetic radiation at harmonics of the electron plasma frequency. We demonstrate that the model predictions agree remarkably well, both qualitatively and quantitatively, with observations.
DE: 6984 Waves in plasma
DE: 7847 Radiation processes
DE: 7871 Waves and instabilities
SC: SPA - Solar and Heliospheric Physics [SH]
MN: 2003 Fall Meeting