The critical ionization velocity as a mechanism for producing Titan's plasma tail

Details The critical ionization velocity as a mechanism for producing Titan's plasma tail The critical ionization velocity as a mechanism for producing Titan's plasma tail

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984azh....61..892g&link_type=abstract

(Astronomicheskii Zhurnal, vol. 61, Sept.-Oct. 1984, p. 892-899) Soviet Astronomy (ISSN 0038-5301), vol. 28, Sept.-Oct. 1984, p.

Astronomy and Astrophysics

Astronomy

Atmospheric Ionization, Satellite Atmospheres, Saturn Atmosphere, Space Plasmas, Titan, Critical Velocity, Earth Magnetosphere, Energy Transfer, Magnetohydrodynamic Waves, Plasma Oscillations, Plasma Waves

Scientific paper

The phenomenon of a critical ionization velocity may explain the anomalous interaction between the magnetospheric plasma corotating with Saturn and the atmosphere of Titan. Although the dominant role will be played by the lower-hybrid instability due to the counterstreaming of the magnetospehric plasma and newly formed atmospheric ions, charge-separation effects caused by the very large Larmor radius of the new nitrogen ions also may trigger instability. The kinetic energy of the newly formed ions will be conveyed to the electrons by plasma waves generated in the counterflow, thereby exciting the atmospheric atoms to emit radiation. The limiting plasma density and electron temperature in Titan's plasma tail and the frequency spectrum of the waves that develop are determined and compared against the Voyager measurements.

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