A theory for the nonthermal radio continua in the terrestrial and Jovian magnetospheres

Details A theory for the nonthermal radio continua in the terrestrial and Jovian magnetospheres A theory for the nonthermal radio continua in the terrestrial and Jovian magnetospheres

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86...30m&link_type=abstract

Journal of Geophysical Research, vol. 86, Jan. 1, 1981, p. 30-36.

Astronomy and Astrophysics

Astronomy

68

Atmospheric Radiation, Gas Giant Planets, Nonthermal Radiation, Planetary Atmospheres, Planetary Magnetospheres, Planetary Radiation, Radio Emission, Continuous Radiation, Cosmic Plasma, Earth Atmosphere, Ion Cyclotron Radiation, Plasma Pressure, Radiation Trapping, Radio Astronomy, Planets, Jupiter, Earth, Magnetosphere, Radioemissions, Waves, Ions, Frequency, Spectrum, Plasmas, Pressure, Radiation, Magnetotail, Thermal Effects, Scattering, Harmonics, Turbulence, Source Medium

Scientific paper

It is assumed that the nonthermal radio continua in the terrestrial and Jovian magnetospheres result from conversion of observed upper hybrid waves into o mode waves. The only favorable conversion mechanism for the escaping terrestrial continuum is coalescence with low-frequency waves, and the most favorable waves are ion-cyclotron waves, which should be generated under conditions similar to those required for generation of upper hybrid waves. It is suggested that the Jovian continuum is in a steady state in which the conversion process is balanced by the inverse process, and it is shown that the implied steady state level is reasonably consistent with observations. To account for the observed spectrum of the Jovian continuum requires that the plasma pressure should be approximately constant over an electron density range of 100-100,000/m. It is suggested that the terrestrial continuum may escape in bubbles of radiation enclosed by plasma downstream from the magnetotail.

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