A Theory of Jovian Shadow Bursts
Abstract
The shadow events in the dynamic spectra of Jovian decametric emission are explained as the result of interaction between electron bunches responsible for S and L emissions. The relevant dispersion relation is derived for the fast extraordinary mode in the cold magnetospheric plasma in the presence of S and L electron bunches. The growth rate of the synchrotron maser instability is studied in the presence and absence of S-electrons. It is shown that the synchrotron maser instability responsible for L-emission can be temporarily quenched by the invasion of S-electrons, thereby stopping the L-emission. The theory accounts for various observed features of the shadow events.
- Publication:
-
Earth Moon and Planets
- Pub Date:
- June 1986
- DOI:
- 10.1007/BF00117270
- Bibcode:
- 1986EM&P...35...93G
- Keywords:
-
- Jupiter Atmosphere;
- Planetary Radiation;
- Planetology;
- Space Plasmas;
- Synchrotron Radiation;
- Decametric Waves;
- Electron Bunching;
- Maser Outputs;
- Planetary Magnetospheres;
- Superhigh Frequencies;
- Ultrahigh Frequencies