ENA Observation from the Dusk Side of Saturn

Details ENA Observation from the Dusk Side of Saturn ENA Observation from the Dusk Side of Saturn

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsm41b..06c&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SM41B-06

Other

2778 Ring Current, 5719 Interactions With Particles And Fields, 5737 Magnetospheres (2756), 5780 Tori And Exospheres

Scientific paper

During 2006, the elongated orbit of Cassini afforded the Ion-Neutral Camera (INCA) the opportunity to view the entire noon-midnight meridional plane of Saturn's magnetosphere at nearly perpendicular incidence. Observations of energetic H (20-50 keV) and O (64-144 keV) were made from ranges exceeding 20 RS (and often exceeding 40 RS) from latitudes less than ~5°. The ENA emissions were concentrated on two "spots" on the equatorial plane - one spot at -9 RS (midnight) and the other at +12 RS (noon). The two spots represent a cross- section of the interaction region between a toroidal neutral density distribution and charged particles. The midnight spot was more intense than the noon spot on account of the Compton-Getting effect caused by the corotational motion of the sources. The ratio of the midnight/noon intensities may be used to obtain an indication of the rotational speeds of the plasma causing the ENA emissions.

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