Stop zones in the Jovian plasmasphere

Details Stop zones in the Jovian plasmasphere Stop zones in the Jovian plasmasphere

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apl....17..167s&link_type=abstract

Astrophysical Letters, vol. 17, no. 4, 1976, p. 167-172.

Astronomy and Astrophysics

Astronomy

3

Decametric Waves, Electromagnetic Wave Transmission, Jupiter Atmosphere, Planetary Magnetospheres, Planetary Radiation, Atmospheric Physics, Io, Polarized Electromagnetic Radiation, Radio Astronomy, Transmissivity

Scientific paper

At frequencies corresponding to the range observed in Io-independent Jovian decametric radiation (DAM), extraordinary-mode electromagnetic waves may tunnel through a region of evanescence to free space without serious attenuation. At higher frequencies observed only in Io-modulated emission, such tunneling is not possible. Therefore, different emission mechanisms are indicated for the Io-modulated and Io-independent components of DAM. In particular, the non-Io-related emission may originate in the trapped-particle radiation belts at larger values of L than are observed at decimetric frequencies. This conclusion may be tested by studying the polarization of low-frequency DAM. Within the contexts of existing theories for the emission mechanism, correlative studies involving the occurrence statistics of Io-independent DAM may be useful for investigations of the dynamics of the Jovian magnetosphere.

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