Periodic intensity variations in global ENA images of Saturn

Details Periodic intensity variations in global ENA images of Saturn Periodic intensity variations in global ENA images of Saturn

Nov 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3221101p&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 21, CiteID L21101

Physics

28

Magnetospheric Physics: Planetary Magnetospheres (5443, 5737, 6033), Magnetospheric Physics: Energetic Particles: Trapped, Planetary Sciences: Fluid Planets: Interactions With Particles And Fields, Planetary Sciences: Fluid Planets: Magnetospheres (2756), Planetary Sciences: Solar System Objects: Saturn

Scientific paper

During select time periods in orbit about Saturn, Cassini's Ion and Neutral Camera (INCA) has detected a periodic global ENA signal. Images taken during such periods reveal the presence of a rotating source component in addition to a steady-state component; both components have peak brightness in the midnight sector, when viewed from near dawn. We present a model that synthesizes some of the basic features of the data and gives good agreement with the integrated signal. Both components, as well as the Compton-Getting effect whose importance was previously unrecognized in ENA imaging, are needed to explain some aspects of the data.

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