Direct observation of warping in the plasma sheet of Saturn

Details Direct observation of warping in the plasma sheet of Saturn Direct observation of warping in the plasma sheet of Saturn

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3524201c&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 24, CiteID L24201

Physics

6

Magnetospheric Physics: Plasma Sheet, Planetary Sciences: Fluid Planets: Interactions With Particles And Fields, Planetary Sciences: Fluid Planets: Tori And Exospheres, Planetary Sciences: Fluid Planets: Magnetospheres (2756)

Scientific paper

The ENA images from the Ion Neutral CAmera (INCA) on the Cassini spacecraft are projected onto the noon-midnight plane of Sun-Saturn orbital coordinates, and a composite ``image'' of Saturn's plasma sheet is constructed from dawn-side observations of 20-50 keV hydrogens obtained from days 352 to 361 in 2004. The maxima in the intensity contours define the center of the plasma sheet in the noon-midnight plane. This plasma sheet surface displays a distinct bending or ``warping'' above Saturn's equatorial plane at radial distances of beyond ~15 RS on the nightside. On the dayside, the plasma sheet lies close to the equator all the way to the magnetopause. The observed warping agrees with the ``bowl'' model derived from measurements of Saturn's magnetic field, but fits more closely a simple third-order polynomial.

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