VLA observations at 6.2 cm of the response of Jupiter's electron belt to the July 2009 event

Details VLA observations at 6.2 cm of the response of Jupiter's electron belt to the July 2009 event VLA observations at 6.2 cm of the response of Jupiter's electron belt to the July 2009 event

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jgra..11612236s&link_type=abstract

Journal of Geophysical Research, Volume 116, Issue A12, CiteID A12236

Physics

Magnetospheric Physics: Planetary Magnetospheres (5443, 5737, 6033), Magnetospheric Physics: Radiation Belts, Planetary Sciences: Comets And Small Bodies: Magnetospheres (2756), Planetary Sciences: Solar System Objects: Jupiter, Radio Science: Interferometry (1207, 1209, 1242)

Scientific paper

We present and analyze observations made with the Very Large Array in 2009. The observations show significant fluctuations in the emission radiated by Jupiter's electron belt between July and September. Intensity variations of 10 up to 40% in the radiation at 6.2 cm were found to be too important to be the results of data errors. The numerical reconstruction of equatorial brightness distributions indicates that the fluctuations were related to the 2009 July impact. The computed tomographic-like maps demonstrate that the formation and subsequent longitudinal dispersion and change in intensity of an impact-related synchrotron “hot spot” were the cause of the fluctuations. By examining the time profile of the longitude-averaged total flux density, we find that the changes in the radiation-belt emission lasted for about 100 days.

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