Sheath Effects and Related Charged-Particle Acceleration by Jupiter's Satellite IO
1972; IOP Publishing; Volume: 175; Linguagem: Inglês
10.1086/151576
ISSN1538-4357
Autores Tópico(s)Ionosphere and magnetosphere dynamics
Resumoview Abstract Citations (75) References (12) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Sheath Effects and Related Charged-Particle Acceleration by Jupiter's Satellite IO Gurnett, Donald A. Abstract Several current theories on the Jovian decametric radio emission, and its modulation by the satellite Io, assume that the plasma within the magnetic flux tube passing through Io is "frozen" to the motion of Io. This paper considers the effects of the plasma sheath around Io on the interaction of Io with the Jovian magnetosphere. It is found that under some conditions the plasma sheath around lo can effectively insulate the magnetospheric plasma from the motional electric field generated within Io, thus preventing the plasma from being frozen to the motion of lo. Under these conditions large potentials are developed across the plasma sheath and emitted photoelectrons can be accelerated to high energies. The sheath voltages which develop are controlled by the ionospheric conductivity at the base of the Io flux tube, as well as other plasma parameters at Io. A simplified model illustrating these basic effects is discussed. Publication: The Astrophysical Journal Pub Date: July 1972 DOI: 10.1086/151576 Bibcode: 1972ApJ...175..525G full text sources ADS |
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