منابع مشابه
Composition and dynamics of plasma in Saturn's magnetosphere.
During Cassini's initial orbit, we observed a dynamic magnetosphere composed primarily of a complex mixture of water-derived atomic and molecular ions. We have identified four distinct regions characterized by differences in both bulk plasma properties and ion composition. Protons are the dominant species outside about 9 RS (where RS is the radial distance from the center of Saturn), whereas in...
متن کاملEvidence for rotationally driven plasma transport in Saturn’s magnetosphere
[1] Radial convective transport of plasma in a rotationdominated magnetosphere implies alternating longitudinal sectors of cooler, denser plasma moving outward and hotter, more tenuous plasma moving inward. The Cassini Plasma Spectrometer (CAPS) has provided dramatic new evidence of this process operating in the magnetosphere of Saturn. The inward transport of hot plasma is accompanied by adiab...
متن کاملPlasma Variations in Saturn‘s Magnetosphere from the Main Rings To
1 University of Virginia, Charlottesville, VA 4 2 Laboratory for Atmospheric and Space Science, Boulder, CO 5 6 Abstract 7 With the discovery of an oxygen atmosphere over Saturn‘s main rings by Cassini (Tokar et 8 al., 2005; Johnson et al. 2006), as well a strong, but variable source from the plumes emanating 9 from Saturn‘s moon Enceladus (Porco et al., 2005; Smith et al., 2010) our picture of...
متن کاملMagnetocentrifugal acceleration of plasma in a nonaxisymmetric magnetosphere
Violation of the axial symmetry of a magnetic field essentially modifies the physics of the plasma outflow in the magnetosphere of rotating objects. In comparison to the axisymmetric outflow, two new effects appear: more efficient magnetocentrifugal acceleration of the plasma along particular field lines and generation of MHD waves. Here, we use an ideal MHD approximation to study the dynamics ...
متن کاملDynamics of Spacecraft Plume/Magnetosphere Interactions in Geostationary Earth Orbit
Detailed direct simulation Monte Carlo/Particle in Cell simulations involving the interaction of a hydrazine chemical rocket plume with the rarefied ambient magnetosphere are presented for steady thruster firings in geostationary Earth orbit (GEO). The hydrazine chemical rocket plume is modeled as a neutral gas mixture with thruster exit conditions corresponding to a mass flow rate of 5.0 × 10−...
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ژورنال
عنوان ژورنال: Highlights of Astronomy
سال: 2005
ISSN: 1539-2996
DOI: 10.1017/s1539299600015094