The Jovian Radiation-Belt Emission: Features and Time Variability.

Details The Jovian Radiation-Belt Emission: Features and Time Variability. The Jovian Radiation-Belt Emission: Features and Time Variability.

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm53a1083b&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SM53A-1083

Physics

2744 Magnetotail, 2756 Planetary Magnetospheres (5443, 5737, 6033), 5443 Magnetospheres (2756), 5737 Magnetospheres (2756)

Scientific paper

We present new results that identify the role of various physical mechanisms in explaining the distribution of high energy electrons trapped in Jupiter's inner radiation belts. Our results indicate the inner radiation belts are linked to processes very close to the planet (such as the ring system and inner satellites) and more distant phenomena (such as that ongoing in the outer magnetosphere and magnetotail). Short term variations in the radiation belts may be a proxy to processes linked to variability in Jupiter's ring system (as observed by New Horizons), whereas long term variations may be linked to distant solar wind interactions with Jupiter. Using a newly modified model and comparing to the observed features in Jupiter's synchrotron emission, we investigate the long- and short-term variations, the brightness distribution, beaming curve and radio spectrum. Specific implications on the importance of phenomena taking place in the inner magnetosphere (interactions with moons and dust, synchrotron mechanism and particle transport) are reported. Mechanisms linked to solar activity and potentially responsible for temporal changes in the Jovian decimetric emission will also be discussed.

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